
Quick overview
- Genuine Pentair Factory part 350166Z for the EQ Series, not a generic ring cut to size.
- Strainer lid seal Seats between the lid and the hair and lint strainer pot on EQ Series commercial pumps.
- Holds prime A lid seal that leaks air is one of the most common reasons a pump will not hold suction.
- Listed two ways Pentair describes this part as a lid o-ring and as the strainer lid gasket; it is the same 350166Z.
- Cheap insurance Worth changing any time the lid is off for a basket clean or a strainer service.
- Commercial duty Matched to the EQ Series pumps used on commercial installations.
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Product details
The Pentair 350166Z is the lid o-ring for EQ Series commercial pumps. It seals the lid on the hair and lint strainer pot. Pentair describes this part both as the lid o-ring and as the strainer lid gasket, so you may see it listed either way; the part number is the same.
The seal that keeps prime
Everything upstream of the impeller is under suction, which means a bad lid seal draws air rather than spilling water. That is why a leaking strainer lid rarely leaves a puddle and often shows up instead as air in the pot, a pump that loses prime, or falling flow. Replacing a hardened or flattened ring is usually the whole repair.
When to change it
Any time the lid comes off for a basket clean is a good moment to look at the ring. If it has taken a permanent set, cracked or gone stiff, replace it rather than dressing it and hoping. If the part you actually need is the lock ring seal instead, that is a separate Pentair number for the EQ Series.
| Brand | Pentair |
|---|---|
| Manufacturer part number | 350166Z |
| UPC | 788379830076 |
| Type | Lid o-ring, also listed as the strainer lid gasket |
| Part type | Pool pump part |
| Fits | Pentair EQ Series commercial pumps |
| Location | Hair and lint strainer lid |
| Shipping weight | 0.02 lb |
| Ships | Parcel |
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