Sta-Rite U178-920P 1/4 inch drain plug with o-ringSta-Rite Drain Plug with O-Ring, 1/4 in. NPT, U178-920P In stock$799
Sta-Rite U178-920P 1/4 inch drain plug with o-ring
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Sta-Rite Drain Plug with O-Ring, 1/4 in. NPT, U178-920P

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$799
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Quick overview

  • Plug and o-ring together Supplied with the o-ring, which is the part that actually seals and the part that usually fails.
  • 1/4 inch NPT The common 1/4 inch drain plug thread used across the Sta-Rite range.
  • Wide fitment Shown on parts diagrams for Sta-Rite ABG, JWPA, Dyna-Glas, Dyna-Max, Max-E-Glas, Dura-Glas, Dura-Jet JS and Max-E-Pro pumps.
  • Also valves and heaters Appears on the Sta-Rite 1-1/2 inch and 2 inch side mount multiport valve and MasterTemp heater water system diagrams.
  • Winterizing part Drain plugs get pulled every fall, which is exactly why the o-ring wears out and the plug head strips.
  • Cheap insurance A plug that will not seal means a pump that weeps all season or one that cannot be drained before a freeze.
Full description and specifications ↓

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Product details

The Sta-Rite U178-920P is a 1/4 inch drain plug supplied with its o-ring, used across a wide range of Sta-Rite pumps, valves and heater water systems.

The o-ring is the part that matters

The plug body is simple, but the o-ring is what actually seals against the housing. It gets compressed and released every time the plug comes out, which on most pools is at least twice a year for winterizing and opening. After enough cycles the ring takes a permanent set or cracks, and the plug that used to seal by hand suddenly weeps no matter how hard it is tightened. Buying the plug with the o-ring removes the guesswork.

Broad fitment

This plug is shown on parts diagrams for Sta-Rite ABG, JWPA, Max-E-Glas, Dura-Glas, Max-E-Glas II, Dura-Glas II, Dyna-Glas, Dyna-Max, Dura-Jet JS Series and Max-E-Pro Series pumps. It also appears on the Sta-Rite 1-1/2 inch and 2 inch side mount multiport valve, MasterTemp heater water system and Pentair Dyna-Wave pump diagrams. Check yours against the relevant breakdown.

Worth keeping spare

Drain plugs are the parts that go missing between seasons or strip in the hand on a cold morning. Keeping one on the shelf costs almost nothing against a pump that cannot be drained before a freeze.

From Pool School

How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read

Where this part goes

19 Key 19 on the Sta-Rite Max-E-Pro PumpFits every model in the drawing.See it on the diagramAll Sta-Rite Max-E-Pro Pump Parts 79 parts and the drawing9 Key 9 on the Pentair Dynamo PumpFits every model in the drawing.See it on the diagramAll Pentair Dynamo Pump Parts 12 parts and the drawing
Specifications
Brand Sta-Rite
Manufacturer part number U178-920P
UPC 788379850395
Type Drain plug with o-ring
Size 1/4 inch
Part type Pool pump part
Fits Select Sta-Rite pumps, including ABG, JWPA, Max-E-Glas, Dura-Glas, Max-E-Glas II, Dura-Glas II, Dyna-Glas, Dyna-Max, Dura-Jet JS Series and Max-E-Pro Series
Also shown on Sta-Rite 1-1/2 inch and 2 inch side mount multiport valve, MasterTemp heater water system, and Pentair Dyna-Wave pump parts diagrams
Shipping weight 0.02 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Does the o-ring come with it?
Yes. U178-920P is supplied as the plug with its o-ring.
What thread size is it?
1/4 inch. It is the standard Sta-Rite drain plug size.
Which pumps does it fit?
It is listed for a wide range of Sta-Rite pumps including the ABG, JWPA, Max-E-Glas, Dura-Glas, Dyna-Glas, Dyna-Max, Dura-Jet JS Series and Max-E-Pro Series, and it appears on Sta-Rite side mount multiport valve, MasterTemp heater water system and Pentair Dyna-Wave diagrams.
My drain plug leaks after winterizing. Is the plug or the o-ring at fault?
Usually the o-ring, which takes a set and cracks after enough seasons. Since the plug and o-ring come together here, replacing both settles the question.
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