YU21405 Unloader Green Spring

Marsoni

M251S

$189.91

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

YU21405 Unloader Green SpringFEATURES: NEW improved design, trapped pressure unloader Reduced pressure loss Extremely reliable Easy maintenance SPECIFICATIONS: Maximum volume: 21 GPM Maximum pressure: 4500 PSI Maximum temperature: 195F. The valve is designed for continuous use at a water temperature of 140F. It can operate for short periods at a maximum temperature of 195F. Inlet: Dual 1 2" FPT Discharge: 1 2" FPT Bypass: 1 2" FPT

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My dog loves these balls. He can’t break them, which is hilarious. The fact that they glow and double as a cognitive toy when you hide treats inside is a huge bonus. My dog is literally darker than the night. We leave the ball near a lamp for 10–15 minutes, then take it outside and throw it. Watching a pitch-black blur sprint at full speed and suddenly seeing a glowing orb bouncing through the night is unreal. Great toy. Highly recommend.

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Reviewed in the United States on January 3, 2026

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Rachael Day

Belleville, US

★★★★★ 5

The ideal fetch ball

Our dog is obsessed with these. They bounce well, they’re squishy enough to meet his chewing needs but strong enough to not get destroyed. We do replace them every 8-10 months because after 2-3 20 min fetch sessions almost everyday they do rip. They have a nice weight to them so they’re easy to hurl 20-30 yards.

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Reviewed in the United States on January 4, 2026

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Michelle

Lowell, US

★★★★★ 5

Awesome product!

Love it! It really glows bright! We have a German Shepherd.

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Reviewed in the United States on March 6, 2026

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Banditrider

Grantham, US

★★★★★ 5

The best for fetching enthusiasts

We have two lab mix dogs that love to play fetch but also have very strong jaws and sharp teeth. Tennis balls last about 10 seconds. I have used these for several years now and they are the best. They glow in the dark for night fetching, have two holes and are hollow so they whistle when you throw them. The dogs chew them like gum when not fetching and they hold up. They last about a year before starting to tear (this is with almost daily use). These balls are their favorites and get they upset if I use something else.

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Reviewed in the United States on August 31, 2024

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Shawn W.

Houston, US

★★★★★ 4

Glows

Tough but not very solid you know things is and squishy. Glows

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Reviewed in the United States on October 12, 2025