3/8" PEX Tubing w/ Oxygen Barrier
Standards: ASTM F876/F877, CSA B137.5, DIN 4726, NSF/ANSI 14, SDR 9
Certifications: nsf-rfh (Radiant Floor Heating Applications)
UPC Listed by IAPMO
Minimum bend. radius: 4"
79psi @ 200F, 100psi @ 180F, 160psi @ 73F
Warrantied by the manufacturer.
Compatible with the following connection systems:
1. Crimp Tool, Crimp Rings and Crimp Fittings.
2. Ratchet Clamp Tool, Stainless Steel Clamps (Cinch Clamps) and Crimp Fittings.
3. Press Tool, St. Steel Press Sleeves and Press Fittings.
4. SharkBite fittings.
3/8" PEX is common for small radiant heating projects, since it's the most flexible barrier type PEX size. Areas of the house such as kitchens and bathrooms require the smallest possible floor elevation and maximum heat distribution, since tile and ceramics are good heat conductors.
Because the OD of the 3/8" barrier PEX is 1/2", and it is the thinnest out of all barrier PEX sizes, installing it would mean a thinner slab and a minimum floor elevation.
Q: What is the recommended loop length for 3/8" PEX?
A: 3/8" PEX is generally installed in loop lengths ranging from 200ft to 250ft. It is not recommended to install this PEX tubing size in lengths longer than 300ft, as it may reduce the delta T of the system and may increase it's response time.
Q: 1/2" or 3/8" PEX - which is better suited for in-floor radiant heating?
A: 1/2" size is by far the most popular for radiant floors, mainly due to the loop length allowances, pressure drop characteristics and nearly equal pricing. 3/8" size, on the other hand, requires less floor elevation and is often used with pre-manufactured floor panels. Bottom line - the answer depends on the type of project, flooring space and other factors.
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