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Brass 1/2-in Compression Cap Fitting

Ratings & Reviews for ProLine Series Brass 1/2-in Compression Cap Fitting

4.6
252
Review
 4.6 out of 5
253 Reviews


94% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The compression cap fitting is generally considered an effective and reliable product for capping off water lines and valves. Many users report the cap fits well and creates a good seal, making it useful for various plumbing projects. Some found using a small washer or Teflon tape helped achieve a tighter seal. While a few experienced leaks or improper fit, the majority of feedback indicates this is a good quality, functional product for its intended purpose.

Customer review summary generated by AI, including incentivized reviews.
253 Customer Reviews

Perfect Find

Would Recommend

Amazing to find a random pipe cap in brass as needed. Perfect fit and solution.

April 12, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Brass valve cap.

Would Recommend

Perfect cap for the brass valve on your project. Always use thread sealer.

April 8, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Water

Exactly what I needed to stop water supply after taking dishwasher out

April 5, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Capped 3/8 water line

Capped water lines. Did not leak.

March 28, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Cap Nuts Have Multiple Uses

Would Recommend

I purchased this Cap Nut to keep the water from dripping from my water filter after I removed the water supply line. This worked excellent now I keep it in my tool bag and ready for the next use.

March 23, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Life changer part!

We had some bozo techs leave our waterline to the dishwasher unhooked so we could install an electrical outlet to correct the former owners diy job. We needed a cap fast and Lowe’s had it in stock to save several days of leaking water until the installers came back to complete their work! Good to have a wide variety of hardware close by for emergencies!

March 20, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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The staff in the store are so unhelpful

Not good quality

March 19, 2026
From Brass 5_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Small & hard to hold onto

Would Recommend

Easy to use

March 5, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Nice brass cap

Would Recommend

Needed a cap in case a valve wouldn’t stop leaking while working on a project.

February 12, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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As expected

Would Recommend

Clean threads, no stripping

January 28, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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Can’t just use by itself.

The cap fit the threads on the water valve exactly. But, I had to use a rubber washer inside the cap and teflon tape on the threads or it would leak.

January 28, 2026
From Brass 3_SLASH_8-in Compression Cap Fitting Verified Purchaser
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