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Description
Zurn Wilkins RK1-375 Reduced Pressure Backflow Complete Repair KitZurn Wilkins RK1 375 Reduced Pressure Backflow Complete Repair Kit. Fits: 1" 375 (1 375), 375XL (1 375XL), and 375ST (1 375ST) Includes: No. 1 and No. 2 check module, all relief valve components, o rings, and lubricant. (x1) 373 300A: #1 Check Assembly (Item 35, Image 3) (x1) 373 300B: #2 Check Assembly (Item 36, Image 3) (x1) 372 50: Relief Valve Stem Assembly (Item 37, Image 3) (x1) 216N: O Ring, Sleeve (Item 3, Image 3) (x1) 227N: O Ring, Housing
Zurn Wilkins RK1-375 Reduced Pressure Backflow Complete Repair Kit.
Fits: 1" 375 (1-375), 375XL (1-375XL), and 375ST (1-375ST)
Includes: No. 1 and No. 2 check module, all relief valve components, o-rings, and lubricant.
- (x1) 373-300A: #1 Check Assembly (Item 35, Image 3)
- (x1) 373-300B: #2 Check Assembly (Item 36, Image 3)
- (x1) 372-50: Relief Valve Stem Assembly (Item 37, Image 3)
- (x1) 216N: O-Ring, Sleeve (Item 3, Image 3)
- (x1) 227N: O-Ring, Housing Inlet (Item 17, Image 3)
- (x1) 218N: O-Ring, Housing Outlet (Item 20, Image 3)
- (x1) 010N: O-Ring, Relief Valve Cover (Item 36, Image 3)
- (x1) WK-018N: O-Ring, Relief Valve Seat (Item 36, Image 3)
- (x1) 372-18: Relief Valve Seat (Item 36, Image 3)
- (x1) 372-33CU: Relief Valve Spring (Item 36, Image 3)
Lead-free law compliant.
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- Free Standard Shipping on $100+ Orders to the USA.
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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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4.4 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 4
the "fit" is very precise
Style: BE-176H 1-Pack
Nice Fabrication, Good materials, perfect adhesive applications, "clean joints" etc.
Appears to be a good UPGRADE from the stock Motorcraft product.
CONs: The FIT was a "smidge TIGHT", and took very precise initial alignment and "pressure" to begin to slide into the rectangular hole. I measured the "Hole" at 7.375" wide, or (187.33 mm)... the FILTER is exactly the SAME.
I would suggest maybe reducing the Width by 1 mm, to allow for an easier installation.
The MOTORCRAFT uses an "open-cell" foam structure for the (2) Side pieces on their filter assembly, allowing some "compression to fit", of the Width, easing the difficulty of installation, yet still filling all voids.
In summation, the "fit" is very precise. Not to be hurried or rushed, maybe a bit meticulous for the impatient or weak of heart.
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Reviewed in the United States on April 2, 2025
★★★★★ 5
Great item and Affordable
Style: BE-157H 1-Pack
Perfectly fit for my corolla
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Breathe Easy!
Style: BE-728H 1-Pack
Ladies and gentlemen, buckle up, because we're about to embark on a whirlwind adventure of cleaner air and contortionist-worthy installation feats with the Spearhead HEPA Breathe Easy Cabin Filter!
First off, let's talk about installation. If you're someone who loves a good yoga session or considers themselves a Cirque du Soleil dropout, this is the filter for you. The instructions are so clear and helpful that even a goldfish could follow them. However, be prepared to twist and turn in ways you didn't know your body could. And let me tell you, I'm not in the best of shape. I discovered muscles I never knew I had and positions that would make a pretzel jealous. But don't worry, it's all worth it.
Once installed, my car’s air quality shot up faster than a rocket to Mars. And although my car is old and doesn't have any fancy AI, it felt like it was saying, "Ahh, finally, some quality air!" The air was so crisp and pure, I half expected to see little cartoon birds chirping around my head. And let me emphasize this: the product quality is top-notch. It not only works great but looks good too.
I purchased this gem because my wife has bad allergies, and so far, it's been a game-changer. She hasn't sneezed once, and the car doesn't smell as musty with the air conditioning on. It's like we've been transported to a fresh, alpine air paradise every time we drive.
In summary, the Spearhead HEPA Breathe Easy Cabin Filter is a game-changer. It's as easy to install as putting on socks—if putting on socks required you to become a human origami. But trust me, once it's in place, your lungs will thank you, and your car will feel like it's breathing the fresh, alpine air of the Swiss Alps. Five stars, and a standing ovation from my now incredibly limber body!
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Reviewed in the United States on July 10, 2024
★★★★★ 5
Works a lot better than the previous one.
Style: BE-775H 1-Pack
Great product at a great price. It seemed to fit almost perfect with out having to crunch it in. Highly recommend.
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Reviewed in the United States on March 5, 2026
★★★★★ 5
Great Cabin Filter Upgrade
Style: BE-729H 1-Pack, Style: BE-729H 1-Pack
I recently replaced my old cabin air filter with this one, and the difference was noticeable right away. Installation was quick and straightforward took less than 10 minutes with no special tools needed.
What I appreciate most is the air quality improvement. The airflow feels stronger, and there’s a clear reduction in dust, odors, and outside pollution entering the cabin.
If you’re looking for an easy, affordable upgrade that actually makes a difference in everyday driving comfort, this cabin filter is definitely worth it.
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Reviewed in the United States on November 19, 2025
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