In brief: replacement Pentair drain plug for SuperMax pump. Pentair part number 357161Z.
The part that gets lost every autumn
The drain plug allows you to completely empty the pump housing. This step prevents residual water from freezing and cracking the pump body during the Quebec winter.
Since it is removed every autumn and put back every spring, it is the part that gets lost, breaks, or has its threads wear out over time.
A plug with damaged threads, or one whose seal no longer holds, allows air into the pump, causing it to lose prime. It is best to keep a spare on hand.
Official Pentair specifications
| Part number |
357161Z |
| Type |
Drain plug |
| Application |
Pentair SuperMax pumps |
| Original part |
Yes, Pentair part |
Frequently asked questions
How should it be tightened?
By hand, plus a slight turn. The O-ring provides the seal. Overtightening can crack the pump housing threads, which is a much more expensive repair.
Should the O-ring be replaced?
Yes, as soon as it is flattened or hardened. It is what creates the seal, not the plug itself.
Where should it be stored during winter?
In the pump basket, under the lid. That is the only reliable way to find it in the spring.
Service on the North Shore
Piscines Geyser keeps Pentair parts in stock in Blainville and serves the Laurentians. Send us a photo of your installation if you are unsure about compatibility: we will confirm before shipping.
