Cooling Systems - Water Discharge Fittings

1/2" Water Pressure Dump
Your Price:
$115.99

1/2" Stainless Steel In Line Pressure Relief Valve Water Dump

128-5015

This has to be one of the coolest and simplest stream lined inventions to come along in recent times. High water pressure spikes plague numerous boats and cause catastrophic engine damage. Until now your only option was an independent pressure relief valve that you then had to plumb to a water dump to discharge the water. Thanks to the Hardin Marine team they have taken the best high flow water valve design and integrated it into a common water dump.

These dumps feature a sleek design as well as unique wrench flats machined into the body aiding in assembly during a one person installation. Constructed from 316L stainless steel. This model provides a 1/2 NPT female thread allowing for any arrangement of possible fitting and hose connections. The unit features a stainless tulip style valve that is spring loaded. The units come preset at approximately 10psi.

  • 1-7/16" Flange Diameter
  • 1/4" Flange Height 
  • 1-1/8" Shaft Outside Diameter
  • 3" Overall Length
  • 1/2" NPT Internal Thread
  • Pre-set at Aprox. 10lb Pressure Relief 
  • Approx. Flow Rate (gallons per minute) 10 psi=7 GPM, 15 psi= 13 GPM, 20 psi=19 GPM

1/2" Water Pressure Dump
Your Price:
$115.99

3/4" Stainless Steel In Line Pressure Relief Valve Water Dump

128-5016

This has to be one of the coolest and simplest stream lined inventions to come along in recent times. High water pressure spikes plague numerous boats and cause catastrophic engine damage. Until now your only option was an independent pressure relief valve that you then had to plumb to a water dump to discharge the water. Thanks to the Hardin Marine team they have taken the best high flow water valve design and integrated it into a common water dump.

These dumps feature a sleek design as well as unique wrench flats machined into the body aiding in assembly during a one person installation. Constructed from 316L stainless steel. This model provides a 3/4 NPT female thread allowing for any arrangement of possible fitting and hose connections. The unit features a stainless tulip style valve that is spring loaded. The units come preset at approximately 10psi.

  • 1-3/4" Flange Diameter
  • 1/4" Flange Height 
  • 1-1/4" Shaft Outside Diameter
  • 4" Overall Length
  • 3/4" NPT Internal Thread
  • Pre-set at Aprox. 10lb Pressure Relief
  • Approx. Flow Rate (gallons per minute) 10 psi=7 GPM, 15 psi= 13 GPM, 20 psi=19 GPM

Billet Aluminum Water Dump

Your Price:
$14.99

Billet Aluminum Water Dump

125-WD-750 + Option(s)

  • -8 AN Threads.
  • Outer Diameter 1".
  • Overall Length 3-1/8".
  • Your choice of Color Option. 
  • Will accept a -8 AN style fitting or 3/4" push-on hose.
  • Includes nut.

Triple -12 AN Polished Stainless Water Dump Fitting
Your Price:
$139.99

Triple -12 AN Polished Stainless Water Dump Fitting

420-907030

  • Constructed of 316L Stainless Steel.
  • Polished to a show quality mirror finish.
  • Three -12 AN Male fittings.
  • Length - 6-1/2"
  • Width - 2-1/8"
  • Depth - 3-1/2"
  • 1-3/4" center to center on the fittings
  • Perfect for intercooler, tailpipe, and even engine water discharge.

    Dual 3/4" NPT Polished Stainless Water Dump Fitting
    Your Price:
    $79.99

    Dual 3/4" NPT Polished Stainless Water Dump Fitting

    420-907040

    • Constructed of Polished 316L Stainless Steel.
    • 3/4" NPT Female Thread
    • Outer Diameter 1-1/4"
    • Overall Length 3-7/8"
    • Overall Width 5-1/4"
    • Perfect for intercooler, tailpipe, and even engine water discharge. 


    Single 3/4" NPT Polished Stainless Water Dump Fitting
    Your Price:
    $52.99

    Single 3/4" NPT Polished Stainless Water Dump Fitting

    420-907020

    • Constructed of Polished 316L Stainless Steel.
    • 3/4" NPT Female Thread
    • Outer Diameter 1-1/4"
    • Overall Length 4"
    • Dumps are perfect for intercooler, tailpipe, and even engine water discharge. 


    1/2" Slip-On Hose Thru-Hull Stainless Steel Water Dump
    Your Price:
    $22.99

    1/2" Slip-On Hose Thru-Hull Stainless Steel Water Dump

    500-0404

    • 1/2" Slip-On
    • Overall Length 2-1/2"
    • Outer Diameter 1"
    • Polished Stainless Steel
    • Requires 5/8" hole.
    • Includes Nut.


    5/8" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $19.99

    5/8" Slip-On Hose Stainless Steel Long Water Discharge Fitting

    780-350-003CHR

    • 5/8" Slip-On
    • Outer Diameter 1-3/4"
    • Overall Length 3"
    • Polished Stainless Steel
    • Stainless Steel main body and flange.
    • Includes nut and gasket.

    5/8" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $19.99

    5/8" Slip-On Hose Stainless Steel Water Discharge Fitting

    780-350-002CHR

    • 5/8" Slip-On
    • Outer Diameter 1-1/2"
    • Overall Length 2-1/8"
    • Polished Stainless Steel
    • Stainless Steel main body and flange.
    • Includes nut and gasket.


    3/4" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $19.99

    3/4" Slip-On Hose Stainless Steel Water Discharge Fitting

    780-350-004CHR

    • 3/4" Slip-On
    • Outer Diameter 1-13/16"
    • Overall Length 2-1/8"
    • Polished Stainless Steel.
    • Stainless Steel main body and flange.
    • Includes nut and gasket.


    1" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $42.99

    1" Slip-On Hose Stainless Steel Water Discharge Fitting

    780-350-006CHR

    • 1" Slip-On
    • Outer Diameter 2-1/4"
    • Overall Length 4"
    • Polished Stainless Steel.
    • Stainless Steel main body and flange.
    • Includes nut and gasket.


    1-1/8" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $44.99

    1-1/8" Slip-On Hose Stainless Steel Water Discharge Fitting

    780-350-066CHR

    • 1-1/8" Slip-On
    • Outer Diameter 2-3/16"
    • Overall Length 2-3/8"
    • Polished Stainless Steel.
    • Stainless Steel main body and flange.
    • Includes nut and gasket.


    1-1/4" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $43.99

    1-1/4" Slip-On Hose Stainless Steel Water Discharge Fitting

    780-350-007CHR

    • 1-1/4" Slip-On
    • Outer Diameter 2-1/2"
    • Overall Length 5-1/8"
    • Polished Stainless Steel
    • Stainless Steel main body and flange.
    • Includes nut.


    1-1/2" Slip-On Hose Stainless Steel Water Discharge Fitting
    Your Price:
    $44.99

    1-1/2" Slip-On Hose Stainless Steel Water Discharge Fitting

    780-350-008CHR

    • 1-1/2" Slip-On
    • Outer Diameter 2-1/4"
    • Overall Length 3-3/16"
    • Polished Stainless Steel.
    • Stainless Steel main body and flange.


    Thru-Hull -10 AN Stainless Steel Water Dump
    Your Price:
    $31.99

    Thru-Hull -10 AN Stainless Steel Water Dump

    500-1770

    • -10 AN Style Fitting
    • Outer Diameter 1-1/16"
    • Overall Length 2-2/8"
    • Polished Stainless Steel.
    • Includes Nut.


    Thru-Hull -8 AN Stainless Steel Water Dump
    Your Price:
    $22.99

    Thru-Hull -8 AN Stainless Steel Water Dump

    500-0409

    • -8 AN Style Fitting.
    • Outer Diameter 1"
    • Overall Length 2-5/16"
    • Polished Stainless Steel.
    • Includes nut.


    4" -10 AN Long Thru-Hull Stainless Steel Water Dump
    Your Price:
    $54.99

    4" -10 AN Long Thru-Hull Stainless Steel Water Dump

    500-1510

    • -10 AN Style Fitting
    • Outer Diameter 1-1/16"
    • Overall Length 4-5/16"
    • Polished Finish.
    • Includes nut.


    4" -12 AN Long Thru-Hull Stainless Steel Water Dump
    Your Price:
    $60.99

    4" -12 AN Long Thru-Hull Stainless Steel Water Dump

    500-1512

    • -12 AN Style Fitting
    • Outer Diameter 1-5/16"
    • Overall Length 4-5/16"
    • Polished Finish.
    • Stainless Steel.
    • Includes nut.


    4" -16 AN Long Thru-Hull Stainless Steel Water Dump
    Your Price:
    $76.99

    4" -16 AN Long Thru-Hull Stainless Steel Water Dump

    500-1516

    • -16 AN Style Fitting
    • Outer Diameter 1-3/4"
    • Overall Length 4-5/16"
    • Polished Finish.
    • Stainless Steel.
    • Includes nut.

    5/8" White Plastic Water Dump
    Your Price:
    $2.99

    5/8" White Plastic Water Dump

    780-285

    5/8 Bilge Thru Hull White

    • Color: White
    • Hose Size: 5/8"
    • Flange OD: 1-1/2"
    • Thread Length: 1-5/8""
    • Overall Inside Length: 2-7/8"
    • Quantity: Sold Individually
    Molded white plastic with broad flange. For use with 5/8" Hose. Not recommended for use below the waterline.