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"Not Happy!!"


Order by 12 PM EST and this system will be on its way the very next day.
Free standard shipping on most products over $199.
Free shipping on most orders over $199 in the continental USA. $299 minimum for extended delivery states: AK, AL, AZ, CA, HI, ID, MD, ME, MN, MS, MT, NH, NV, OR, UT, VA, VT, WA, WV. Freight orders excluded. Speak to a water expert for more details.
Our Master Water Specialists and Certified Water Specialists review your water analysis and address your specific water problems. WE then design a system that we'll guarantee will solve your water problem(s) and back it with our One-Year Money Back Promise (Guarantee).
It all starts with a Laboratory Test of your water. Then, our Master Water Specialists and Certified Water Specialists will review the results of your water analysis and scientifically discuss the best way to treat your water, provide on estimate of how to do that, and then we provide you a One-Year Guarantee of Satisfaction. It's our Promise to You that our system will do what we say or we will give you your money back*
Part Number: PI201210S
This fitting is made of the following components:
About John Guest FittingsOverall rating: 3.75 / 5 from 4 reviews.
Review topics: ["quality"].
"Not Happy!!"
— Darlene G. (1/5)
"Excellent Customer Service!"
— Paul Z. (5/5)
"I only found this 3/8" x 5/16" quick connect reducing union on a few websites and US Water systems.com was the only one that the price was worth considering. The item shipped quickly and is of great quality. It worked like a charm. It saved me from spending more time and money replacing other parts. The only thing is that it's a bit pricey for a connector... but as I said it worked. So in the end, I think it was worth it. Thanks!"
— Ryan (5/5)
"Product works quite well, I would buy it again in the future."
— Joe (4/5)
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