



Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.
🔗 Connect with confidence—where precision meets peace of mind!
The John Guest 15mm x 3/8" Straight Connector is a compact, lead-free plastic adapter designed for seamless connection between copper and plastic pipes. Featuring advanced Grip and Seal technology, it ensures a secure, leak-proof fit. Certified by BSI and WRAS, this connector is ideal for hot and cold water as well as central heating systems, delivering reliable performance trusted by professionals.







| ASIN | B00HVFULY2 |
| Best Sellers Rank | 32,385 in DIY & Tools ( See Top 100 in DIY & Tools ) 213 in Pipes, Pipe Fittings & Accessories |
| Brand | John Guest |
| Colour | Grey, White |
| Connector Type | Adapter |
| Customer Reviews | 4.7 4.7 out of 5 stars (42) |
| Item Dimensions | 5.5 x 2.5 x 2.5 centimetres |
| Item Weight | 10 Grams |
| Manufacturer | John Guest |
| Material | Copper, Plastic |
| Number of Pieces | 1 |
| Size | 15mm x 3/8" |
| Thread Size | 0.375 inches |
| Thread Type | UN |
| Unit Count | 1.0 count |
A**W
Quality fitting, did the job perfectly.
Used to connect a 15mm copper pipe to a 3/8" plastic tube for drinking water from our borehole, worked perfectly.
K**N
Used for reducing pipework on a beer cooler
Good solid push fit fitting. You can tell when it is fully in place as you feel a sort of click as it beds home. We needed to drop from 15mm to 3/8" then use another reducer to get down from 3/8" to the 5/16" cooling line we use (unfortunately there doesn't appear to be a direct 15mm to 5/16" reducer)
M**Y
It’s a J G fitting
It’s a John Guest fitting, as usual no leaks. You cannot buy better.
6**0
Working nicely, no leaks.
It took a while to find these reducers as they go from metric to imperial and water filters tend to be made for the American market and they use imperial. 15mm to 10mm won't do. (The pipe size is usually marked on the filter's in-pipe in very small letters) This is one of those devices that you have to have if you want the function.
Trustpilot
2 months ago
2 days ago