Thru-Hulls & Seacocks

Patented field reversible handle allows you to select the closed position orientation (Clockwise or Counterclockwise) that best suits the installation. Handle has square hole to accept standard ratche... More Details

Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-FTH1000WManufacturer:GROCOManufacturer Part #:FTH-1000-WUPC:742985002678Order In Multiples Of:1Pipe1"Length2.56" Variations3... More Details

Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-FTH1500WManufacturer:GROCOManufacturer Part #:FTH-1500-WUPC:742985003606Order In Multiples Of:1Pipe1-1/2"Length3.50" Variati... More Details

Includes locknut. Bronze.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-FTH750WManufacturer:GROCOManufacturer Part #:FTH-750-WUPC:742985002609Order In Multiples Of:1Pipe3/4"Length2.31" Variations3... More Details

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-HSTH1500WManufacturer:GROCOManufacturer Part #:HSTH-1500-WUPC:74298514325... More Details

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-HSTH1250WManufacturer:GROCOManufacturer Part #:HSTH-1250-WUPC:74298514312... More Details

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-HSTH1000WManufacturer:GROCOManufacturer Part #:HSTH-1000-WUPC:74298514311... More Details

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-HSTH2000WManufacturer:GROCOManufacturer Part #:HSTH-2000-WUPC:74298514290... More Details

Provides low pressure, low profile flow into plumbing system. Includes nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-HSTH750WManufacturer:GROCOManufacturer Part #:HSTH-750-WUPC:742985141728O... More Details

Includes locknut. Stainless Steel. Part #:34-HTH1000SManufacturer:GROCOManufacturer Part #:HTH-1000-SUPC:742985139039Order In Multiples Of:1Hose1"Pipe1" NPSFlange2.3" dia.Length2.81" Variations34-HTH1... More Details

Includes locknut. Stainless Steel. Part #:34-HTH1125SManufacturer:GROCOManufacturer Part #:HTH-1125-SUPC:742985138995Order In Multiples Of:1Hose1-1/8"Pipe1-1/8" NPSFlange2.32" dia.Length2.75" Variatio... More Details

Includes locknut. Stainless Steel. Part #:34-HTH1250SManufacturer:GROCOManufacturer Part #:HTH-1250-SUPC:742985139008Order In Multiples Of:1Hose1-1/4"Pipe1-1/4" NPSFlange2.62" dia.Length2.75" Variatio... More Details

Includes locknut. Stainless Steel. Part #:34-HTH1500SManufacturer:GROCOManufacturer Part #:HTH-1500-SUPC:742985139015Order In Multiples Of:1Hose1-1/2"Pipe1-1/2" NPSFlange2.89" dia.Length2.79" Variatio... More Details

Includes locknut. Stainless Steel. Part #:34-HTH2000SManufacturer:GROCOManufacturer Part #:HTH-2000-SUPC:742985139022Order In Multiples Of:1Hose2"Pipe2" NPSFlange3.33" dia.Length2.80" Variations34-HTH... More Details

Includes locknut. Stainless Steel. Part #:34-HTH500SManufacturer:GROCOManufacturer Part #:HTH-500-SUPC:742985142121Order In Multiples Of:1Hose1/2"Pipe1/2" NPSFlange1.70" dia.Length2.68" Variations34-H... More Details

Includes locknut. Stainless Steel. Part #:34-HTH625SManufacturer:GROCOManufacturer Part #:HTH-625-SUPC:742985138971Order In Multiples Of:1Hose5/8"Pipe5/8" NPSFlange1.90" dia.Length2.68" Variations34-H... More Details

Includes locknut. Stainless Steel. Part #:34-HTH750SManufacturer:GROCOManufacturer Part #:HTH-750-SUPC:742985138988Order In Multiples Of:1Hose3/4"Pipe3/4" NPSFlange1.90" dia.Length2.71" Variations34-H... More Details

Includes locknut. Part #:34-HTH1000Manufacturer:GROCOManufacturer Part #:HTH-1000UPC:742985005228Order In Multiples Of:1Flange2.3"Hose1"Length2.8"Pipe1" NPS Variations34-HTH625Groco HTH625 Bronze Hose... More Details

Includes locknut. Part #:34-HTH1125Manufacturer:GROCOManufacturer Part #:HTH-1125UPC:742985103979Order In Multiples Of:1Flange2.3"Hose1 1/8"Length2.8"Pipe1" NPS Variations34-HTH625Groco HTH625 Bronze ... More Details

Includes locknut. Part #:34-HTH1250Manufacturer:GROCOManufacturer Part #:HTH-1250UPC:742985005235Order In Multiples Of:1Flange2.6"Hose1 1/4"Length2.8"Pipe1 1/4" NPS Variations34-HTH625Groco HTH625 Bro... More Details

Includes locknut. Part #:34-HTH1500Manufacturer:GROCOManufacturer Part #:HTH-1500UPC:742985005242Order In Multiples Of:1Flange2.9"Hose1 1/2"Length2.8"Pipe1 1/2" NPS Variations34-HTH625Groco HTH625 Bro... More Details

Includes locknut. Part #:34-HTH2000Manufacturer:GROCOManufacturer Part #:HTH-2000UPC:742985097421Order In Multiples Of:1Flange3.3"Hose2"Length2.8"Pipe2" NPS Variations34-HTH625Groco HTH625 Bronze Hose... More Details

Includes locknut. Part #:34-HTH500Manufacturer:GROCOManufacturer Part #:HTH-500UPC:742985004900Order In Multiples Of:1Flange1.7"Hose1/2"Length2.7"Pipe1/2" NPS Variations34-HTH625Groco HTH625 Bronze Ho... More Details

Includes locknut. Part #:34-HTH625Manufacturer:GROCOManufacturer Part #:HTH-625UPC:742985062269Order In Multiples Of:1Flange1.9"Hose5/8"Length2.7"Pipe3/4" NPS Variations34-HTH1000Groco HTH1000 Bronze ... More Details

Includes locknut. Part #:34-HTH750Manufacturer:GROCOManufacturer Part #:HTH-750UPC:742985005211Order In Multiples Of:1Flange1.9"Hose3/4"Length2.7"Pipe3/4" NPS Variations34-HTH625Groco HTH625 Bronze Ho... More Details

Includes locknut. Part #:34-HTHC1000SManufacturer:GROCOManufacturer Part #:HTHC-1000-SUPC:742985139299Order In Multiples Of:1Hose1" I.D.Pipe1" NPTFlange2.32" Variations34-HTHC1500SGroco HTHC-S #316 SS... More Details

Includes locknut. Part #:34-HTHC1250SManufacturer:GROCOManufacturer Part #:HTHC-1250-SUPC:742985139305Order In Multiples Of:1Hose1-1/4" I.D.Pipe1-1/4" NPTFlange2.62" Variations34-HTHC1500SGroco HTHC-S... More Details

Includes locknut. Part #:34-HTHC1500SManufacturer:GROCOManufacturer Part #:HTHC-1500-SUPC:742985139312Order In Multiples Of:1Hose1-1/2" I.D.Pipe1-1/2" NPTFlange2.89" Variations34-HTHC1000SGroco HTHC-S... More Details

Includes locknut. Part #:34-HTHC2000SManufacturer:GROCOManufacturer Part #:HTHC-2000-SUPC:742985142138Order In Multiples Of:1Hose1-3/4" I.D.Pipe2" NPTFlange3.33" Variations34-HTHC1500SGroco HTHC-S #31... More Details

Includes locknut. Part #:34-HTHC750SManufacturer:GROCOManufacturer Part #:HTHC-750-SUPC:742985139282Order In Multiples Of:1Hose3/4" I.D.Pipe3/4" NPTFlange1.90" Variations34-HTHC1500SGroco HTHC-S #316 ... More Details

Adapter eliminates dangerous thread mis-matches between thru-hulls and in-line valves and valve damage in OEM installations. Accepts a standard thru-hull fitting into the base and a standard in-line v... More Details

NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-IBVF1250Manufacturer:GROCOManufacturer Part #:IBVF-1250UPC:742985143968Order In Multiples Of:1Pipe1-1/4" NPS to 1-1/4" NPT Variations34-IBVF2500Groco... More Details

Adapter eliminates dangerous thread mis-matches between thru-hulls and in-line valves and valve damage in OEM installations. Accepts a standard thru-hull fitting into the base and a standard in-line v... More Details

NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-IBVF2000Manufacturer:GROCOManufacturer Part #:IBVF-2000UPC:742985143982Order In Multiples Of:1Pipe2" NPS to 2" NPT Variations34-IBVF2500Groco IBV-F B... More Details

Adapter eliminates dangerous thread mis-matches between thru-hulls and in-line valves and valve damage in OEM installations. Accepts a standard thru-hull fitting into the base and a standard in-line v... More Details

Adapter eliminates dangerous thread mis-matches between thru-hulls and in-line valves and valve damage in OEM installations. Accepts a standard thru-hull fitting into the base and a standard in-line v... More Details

Bronze. With mounting ring. Easy access to the thru-hull fitting and seacock beneath Groco hull strainer with patented access door design. No need to remove the entire strainer to clear nuisance marin... More Details

Bronze. With mounting ring. Easy access to the thru-hull fitting and seacock beneath Groco hull strainer with patented access door design. No need to remove the entire strainer to clear nuisance marin... More Details

Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-SC1000LManufacturer:GROCOManufacturer Part #:SC-1000-LUPC:742985122673Order In Multiples Of:1Size5.25" x 3.62"Max Thru-H... More Details

Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-SC1500LManufacturer:GROCOManufacturer Part #:SC-1500-LUPC:742985122666Order In Multiples Of:1Size6.82" x 4.70"Max Thru-H... More Details

Bronze. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-SC2500LManufacturer:GROCOManufacturer Part #:SC-2500-LUPC:742985122680Order In Multiples Of:1Size8.50" x 6.00"Max Thru-H... More Details

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-SC1000Manufacturer:GROCOManufacturer ... More Details

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-SC1500Manufacturer:GROCOManufacturer ... More Details

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners. Part #:34-SC1500ALManufacturer:GROCOManufacturer Part #:SC1500ALUPC:742985141643Order I... More Details

Mount the ring permanently. Fasten the strainer to the ring and remove as often as needed. Uses 6 #10 fasteners.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-SC2500Manufacturer:GROCOManufacturer ... More Details

Allows instant emergency bilge pumping, or to simplify winterization and cooling system flushing. While the engine is running, close the seacock and remove the quick release plug. Includes service ada... More Details

Allows instant emergency bilge pumping, or to simplify winterization and cooling system flushing. While the engine is running, close the seacock and remove the quick release plug. Includes service ada... More Details

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B Part #:34-TH1500WSManufacturer:GROCOManufacturer Part #:TH-1500-WSUPC:742985146495Order In Multiples Of:1Thread1-1/2"C2.89"B0.30"A3.15"T... More Details

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B Part #:34-TH1250WSManufacturer:GROCOManufacturer Part #:TH-1250-WSUPC:742985146488Order In Multiples Of:1Thread1-1/4"C2.62"B0.30"A2.90"T... More Details

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B Part #:34-TH1000WSManufacturer:GROCOManufacturer Part #:TH-1000-WSUPC:742985146471Order In Multiples Of:1Thread1"C2.32"B0.30"A2.85"Threa... More Details

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B Part #:34-TH500WSManufacturer:GROCOManufacturer Part #:TH-500-WSUPC:742985158887Order In Multiples Of:1Thread1/2"C1.70"B0.30"A2.20"Threa... More Details

NPSM / NPT combination thread#316 Stainless SteelUL Listed 647B Part #:34-TH750WSManufacturer:GROCOManufacturer Part #:TH-750-WSUPC:742985146464Order In Multiples Of:1Thread3/4"C1.90"B0.30"A2.20"Threa... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH1000WManufacturer:GROCOManufacturer Part #:STH-1000-WUPC:742985063907Order In Multiples Of:1Thread1"A2.85"B1.05"C4.00"D3.05"... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH1250WManufacturer:GROCOManufacturer Part #:STH-1250-WUPC:742985063914Order In Multiples Of:1Thread1 1/4"A2.90"B1.20"C4.30"D3... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH1500WManufacturer:GROCOManufacturer Part #:STH-1500-WUPC:742985063921Order In Multiples Of:1Thread1 1/2"A3.15"B1.30"C4.38"D3... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH2000WManufacturer:GROCOManufacturer Part #:STH-2000-WUPC:742985101739Order In Multiples Of:1Thread2"A3.60"B1.50"C5.75"D4.00"... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH2500WManufacturer:GROCOManufacturer Part #:STH-2500-WUPC:742985172227Order In Multiples Of:1Thread2 1/2"A3.20"B2.25"C7.85"D5... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH500WManufacturer:GROCOManufacturer Part #:STH-500-WUPC:742985063884Order In Multiples Of:1Thread1/2"A2.20"B1.05"C3.28"D2.55"... More Details

Includes locking nut. NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-STH750WManufacturer:GROCOManufacturer Part #:STH-750-WUPC:742985063891Order In Multiples Of:1Thread3/4"A2.20"B1.05"C4.00"D3.05"... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Should have threaded portion cut to proper length considering hull and butt block thickness. Consider thread depth when using a seacock. Sealant is recommended between hull and thru-hull flange. Inclu... More Details

Part #:34-TH2000WSManufacturer:GROCOManufacturer Part #:TH-2000-WSUPC:742985146501Order In Multiples Of:1Thread2"C3.33"B0.3"A3.9"Thread Size2" Variations34-TH500WSGroco Stainless Steel Thru-Hull Fitti... More Details

Enables Installations GROCO thru-hull fittings by a single installer. Slide the thru-hull fitting, flanged end first, over the tool. (It will stop at the proper step.) Tie a length of monofilament to ... More Details

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-THXL1000WManufacturer:GROCOManufa... More Details

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-THXL1250WManufacturer:GROCOManufa... More Details

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-THXL1500WManufacturer:GROCOManufa... More Details

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-THXL2000WManufacturer:GROCOManufa... More Details

Extra long through hull for installations where hull thickness dictates the use of longer fitting. Locknut included.NOT TO BE USED IN POTABLE WATER SYSTEMS. Part #:34-THXL750WManufacturer:GROCOManufac... More Details

Extra long NPSM / NPT combination thread#316 Stainless Steel Part #:34-THXL1000WSManufacturer:GROCOManufacturer Part #:THXL-1000-WSUPC:742985175174Order In Multiples Of:1Pipe1"C2-11/32"B5/16"A5-11/32"... More Details

Extra long NPSM / NPT combination thread#316 Stainless Steel Part #:34-THXL1250WSManufacturer:GROCOManufacturer Part #:THXL-1250-WSUPC:742985174894Order In Multiples Of:1Pipe1-1/4"C2-5/8"B5/16"A5-7/16... More Details

Extra long NPSM / NPT combination thread#316 Stainless Steel Part #:34-THXL1500WSManufacturer:GROCOManufacturer Part #:THXL-1500-WSUPC:742985175181Order In Multiples Of:1Pipe1-1/2"C2-7/8"B5/16"A5-7/16... More Details

Extra long NPSM / NPT combination thread#316 Stainless Steel Part #:34-THXL2000WSManufacturer:GROCOManufacturer Part #:THXL-2000-WSUPC:742985175198Order In Multiples Of:1Pipe2"C3-11/32"B5/16"A5-9/16" ... More Details

Extra long NPSM / NPT combination thread#316 Stainless Steel Part #:34-THXL750WSManufacturer:GROCOManufacturer Part #:THXL-750-WSUPC:742985175167Order In Multiples Of:1Pipe3/4"C1-7/8"B5/16"A5-11/32" V... More Details

Variations More Details

Variations More Details

Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless steel filtering screen. Part #:6-364000000Manufacturer:JA... More Details

This compact pre filter prevents particles jamming valves and causing pump breakdowns - we've given it a screw off, transparent housing for easy inspection and quick, in place cleaning. Part #:6-46200... More Details

This compact pre filter prevents particles jamming valves and causing pump breakdowns - we've given it a screw off, transparent housing for easy inspection and quick, in place cleaning. Part #:6-46400... More Details

Strainer Only for 6 GPM Part #:6-464000711Manufacturer:JABSCOManufacturer Part #:46400-0711UPC:671880583039Order In Multiples Of:1DescriptionStrainer Only for 6 GPM Variations6-10400000Jabsco 10400000... More Details

Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless steel filtering screen. Part #:6-362001000Manufacturer:JA... More Details

Prevents dirt and other particles from entering pump intake. Cuts down on repairs. Transparent housing for quick inspection, 50 mesh stainless steel filtering screen. Part #:6-364001000Manufacturer:JA... More Details

Strainer features a transparent cover for simple inspection, a wide variety of KlickTite™ port connectors for simple installation and removal, and high quality materials for simple maintenance. The co... More Details

Strainer features a transparent cover for simple inspection, a wide variety of KlickTite™ port connectors for simple installation and removal, and high quality materials for simple maintenance. The co... More Details

Replacement Thru-Hull Nut Part #:189-54033PKManufacturer:JOHNSON PUMP/MAYFAIRManufacturer Part #:54033PKOrder In Multiples Of:1Fig.D2/E2FitsAerator Pump: 2810300, 28123, 28503, 28703, 38103, 38123, 38... More Details

Replacement Straight Aerator Thru-hull Part #:189-54234PKManufacturer:JOHNSON PUMP/MAYFAIRManufacturer Part #:54234PKOrder In Multiples Of:1Fig.DFitsAerator Pumps: 28503, 28703, 28103-00, 28123Descrip... More Details

Replacement 90° Aerator Thru-hull Assembly Part #:189-54236PKManufacturer:JOHNSON PUMP/MAYFAIRManufacturer Part #:54236PKOrder In Multiples Of:1Fig.EFitsAerator Pump: 38103, 38123, 38503, 38703Descrip... More Details

Fittings are molded of tough acetal resin so they will not rust, corrode, discolor nor are they susceptible to electrolysis. White. Skin pack. Part #:189-7503500Manufacturer:JOHNSON PUMP/MAYFAIRManufa... More Details

Johnson Pump 90191 Aerator Head - Overall Length 13-3/4" Thru-Hull, One Shut Off Valve. Part #:189-9019100Manufacturer:JOHNSON PUMP/MAYFAIRManufacturer Part #:90191-00UPC:729321901918Order In Multiple... More Details

Johnson Pump 90331 Aerator Head - Overall Length 12-3/4", 3/4" Thru-Hull, One Shut Off Valve. Part #:189-90331Manufacturer:JOHNSON PUMP/MAYFAIRManufacturer Part #:90331UPC:729321903318Order In Multipl... More Details

Pod Type Transducer Part #:149-00014887001Manufacturer:LOWRANCEManufacturer Part #:000-14887-001UPC:9420024177495Order In Multiples Of:1Description9-Pin Shoot-Thru Hull Pod Med/High CHIRP with Remote ... More Details

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection require... More Details

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection require... More Details

Same precision specifications as Marine Hardware ball valves. Triangular flange machined smooth for flush-fit hull mounting. Includes ground screw, mounting boss and drain. Cathodic protection require... More Details