Hayward TriStar or EcoStar Pump Housing Cracked or Leaking? How to Replace the SPX3200A

A puddle under the pump does not always mean the housing is bad. Most of the time it is a shaft seal or an o-ring. But when the plastic pump body itself splits, no gasket in the world is going to fix it, and that is when you need a Hayward SPX3200A housing.

Here is how to tell the difference before you spend money.

Why is my Hayward pump leaking from the body?

A cracked pump housing almost always comes from water freezing inside the pump over winter. Water expands when it freezes, and the plastic body is the part that gives. The second most common cause is over-tightening the plumbing unions or threading a fitting in too hard, which puts a stress crack around the port.

Other things that lead to a bad housing:

• Running the pump dry, which overheats the plastic near the volute
• Old age and sun exposure making the body brittle
• A previous repair where someone used pipe dope or the wrong sealant on threads
• Impact damage from equipment pad work

How do I know it is the housing and not just a seal?

Dry the whole pump off, run it, and watch where the water shows up first. If it comes out of the gap between the motor and the pump body, that is the mechanical seal. If it drips from the clear lid, that is the strainer cover o-ring. If water is weeping straight out of the plastic somewhere it should be solid, the housing is cracked.

A few more checks:

• Shut the pump off and look again. A crack usually keeps leaking with the pump off because the water is under static pressure. A shaft seal leak often slows way down.
• Look at the bottom and back of the volute with a flashlight. Freeze cracks like to hide underneath.
• Check around the suction and discharge ports. Hairline stress cracks show up there first.
• If you see a white or chalky line in the plastic, that is a stress fracture starting.

Do not try to epoxy a cracked pump body. People do it, and it might hold for a few weeks, but the housing is a pressure vessel and the patch will let go.

Which pumps does the SPX3200A housing fit?

The SPX3200A is the replacement housing for select Hayward TriStar and EcoStar pumps. Those two families share the same wet end design, which is why one housing covers both.

Before you order, match the part number on your existing pump or check the label on the motor. Hayward has used a few different volute versions across model years and horsepower ranges, so the safest move is to confirm your model number rather than going by looks. If your pump is a Super Pump, MaxFlo, or Power-Flo, the SPX3200A is not the right housing for you.

How to replace the SPX3200A pump housing

This is a wet-end job. You are moving the motor and internals over to a new body, not replacing the whole pump.

• Turn the breaker off at the panel. Do not skip this.
• Close the valves on the suction and return lines, then open the air relief on the filter to drop the pressure.
• Loosen the plumbing unions on both sides of the pump.
• Pull the drain plugs and let the housing empty out.
• Remove the bolts holding the motor assembly to the housing, then slide the motor and seal plate straight back.
• Move everything over to the new SPX3200A housing. Replace the housing o-ring while you are in there, it is cheap and you already have the pump apart.
• Bolt it back together evenly, snug in a cross pattern. Do not crank on the bolts.
• Reconnect the unions hand tight plus a small turn. Over-tightening is what cracks these in the first place.
• Fill the strainer basket with water, close the lid, open the valves, and prime the pump.

Watch it run for ten minutes and check for drips before you walk away.

Is it worth replacing the housing, or should I buy a new pump?

If the motor is healthy and reasonably new, replacing the SPX3200A housing is the cheaper path by a wide margin. A new TriStar or EcoStar pump costs several times what the housing does.

Buy the whole pump instead if the motor is also noisy, tripping the breaker, or already past ten years old. At that point you are patching one worn part on a system that is going to hand you another repair next season. Also consider a full replacement if your pump is single speed, since variable speed models cut running costs enough to change the math.

Parts to have ready before you start

Since the pump is already apart, it is worth having the wear items on hand so you are not making a second trip:

• Housing o-ring
• Strainer cover o-ring
• Mechanical shaft seal assembly
• Drain plug o-rings
• Silicone lubricant, not petroleum grease

Replacing all of that at once means the pump goes back together sealed everywhere, and you are not chasing a new drip a week later.

Hayward | SPX3200A | Pump Housing | Replacement Housing for TriStar & EcoStar Pumps

$299.00

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