Unitherm Governor, Raypak 151/153/155A

Marsoni

M251S

$144.60

Get it in 3 business days with 1 day shipping. Friday, May 29

Unitherm Governor, Raypak 151/153/155AThis is a Unitherm Governor, part number 053242B, designed for Raypak 151 153 155A pool and spa heaters. Ensure optimal temperature regulation with this essential replacement part.

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We offer a 30-day return/exchange service after receiving.
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I’ve used this filter on my camper for years without issues, so I installed one in my outdoor kitchen at home. It was connected to a hose bib and left under constant pressure, feeding a small electric water heater for a sink. That turned out to be a mistake. Overnight, the top of the filter housing cracked and leaked water throughout the cabinet. No idea how long it was spraying. This filter works fine for intermittent use (like camping), but it does not appear to be designed for continuous pressure. I would not recommend installing it in a permanent, always-pressurized setup.

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Reviewed in the United States on April 14, 2026

Verified Purchase

Justme.

Los Angeles, US

★★★★★ 5

Perfect, fits, nice to just have them sent to us.

Style: Standard Filter

Fits the bill. Clean water is so important and we enjoy the ease of having these sent right to us as we don’t live close to physical stores. They’re easy to install and the price is right!

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Reviewed in the United States on May 23, 2026

Verified Purchase

Jay M.

Lake Worth, US

★★★★★ 5

Easy to install

Style: Standard Filter

Works great in RV

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Reviewed in the United States on May 24, 2026

Verified Purchase

Kyle

Dallas, US

★★★★★ 5

Nice hose filter for filling hot tubs

Style: Standard Filter

I bought this for filling up my hot tub. It does the trick. Straight tap water was difficult to balance the ph and keep it stable. When I fill the hot tub using the filter, the water is more balanced and easier to maintain. I used it for two 390gal refills before I noticed it was getting slower, so ordered another one. I haven’t used it for drinking water so can’t comment on the taste. It does seem to help with hardness though.

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Reviewed in the United States on May 3, 2026