Piston Knob, Hayward RegenX RG450

Marsoni

M251S

$23.60

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

Piston Knob, Hayward RegenX RG450Replace your worn or damaged piston knob with this RGX45K replacement for Hayward RegenX RG450 systems. This ensures proper operation of your pool or spa's regeneration valve.

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I bought these in both small and medium size. The small bag fits the Kitsch solid hair soap perfectly. They also fit a bar of Dove soap. Some types of soap, like Zest, are a tighter fit bit still work. If you want more of a washcloth style with extra suds, use the medium bag. The medium bag works well with those large bars of soap, like Duke Cannon Big Brick of soap. I hand these off little hooks in my shower so the bag dry faster and so I appreciate the loop they have on the corner. The folding top works way better then a drawstring. I also love the exfoliating texture. Overall, these are well worth the price.

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Reviewed in the United States on May 6, 2026

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toni

Omaha, US

★★★★★ 5

Good product

Size: Small Size

I actually testy liked this. Works great, fits smaller bar soaps

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Reviewed in the United States on April 27, 2026

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Alexander Giang

Natrona Heights, US

★★★★★ 4

Good exfoliating soap bag

Size: Small Size

Pretty good soap bag. Does take a while to get it to foam soap, maybe I'm doing it wrong? Great scrubbing.

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Reviewed in the United States on April 9, 2026

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Joan Meisenhelter

Phoenix, US

★★★★★ 5

Perfect for travel!

Size: Small Size

Love these and perfect for my bar soap. European hotels love their body wash refillable bottles but I like my soap! This keeps my bar soap clean and prevents me from dropping on the hotel shower floor. Also makes it nice for packing as it takes up less room than a soap dish. Last a long time! Use this all the time on monthly trips and is just like new. Good buy!

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Reviewed in the United States on May 21, 2026