Interpump Unicontrol Unloader Valve w/ Injector

Interpump Unicontrol Unloader Valve w/ Injector

Marsoni

M251S

$87.17

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

Interpump Unicontrol Unloader Valve w/ Injector310 Bar max pressure 6 14 Lpm flow 85C max water temperature Trapped pressure valve Adjustable chemical injection Brass & st. steel construction 3 8"BSPF inlet 3 8"BSPF outlet 3 8"BSPF bypass

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Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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This replacement roller mop fits perfectly and works just like the original. Installation was quick and easy, and the quality feels durable and well-made. It does an excellent job picking up dust and light debris while providing consistent floor cleaning performance. The roller is washable, easy to maintain, and holds up well after multiple cleaning cycles. I appreciate that it restores the robot’s cleaning effectiveness without any compatibility issues. If you own a compatible Eufy model and need a replacement, this is a reliable option that keeps your robot performing at its best. Highly recommended for maintaining optimal cleaning results.

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Reviewed in the United States on May 30, 2026

Verified Purchase

Grandma of 5

Massapequa, US

★★★★★ 5

Fit perfectly

Fit perfectly!

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Reviewed in the United States on March 12, 2026

Verified Purchase

Blaine

Grantham, US

★★★★★ 5

The best quality

Love Eufy

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Reviewed in the United States on January 4, 2026

Verified Purchase

Emanuel

San Leandro, US

★★★★★ 1

Not good, poor quality from Eufy products

I bought this as a last try to fix my unit. I wanted to share my experience with the Eufy S1 Pro after owning two units. Unfortunately, both units had serious issues. The first one developed multiple problems within less than a year: Dirty water tank issues Mop roller lifting motor malfunction Loud and abnormal noise during dust collection Eventually stopped working completely Despite that, I decided to give it another try and purchased a second unit, planning to reuse parts from the first one if needed. However, the second unit failed even faster. After around 2 months, it stopped performing dust suction from the robot to the base station. At this point, I cannot recommend this product. The reliability has been very poor in my experience, especially considering the price. On a positive note, customer support has been responsive and helpful, but unfortunately, the product quality itself did not meet expectations.

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Reviewed in the United States on March 29, 2026

Verified Purchase

Captain Insano

Lowell, US

★★★★★ 5

Works just as expected

It fits and is the oem part.

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Reviewed in the United States on April 3, 2025