Specifications

10
Optional Plumbing Procedures
This section provides information on plumbing with copper fittings and with plastic pipe.
Hard Plumbing the Bypass With Copper Fittings
Do not use Qest fittings for hard plumbing the bypass connection with copper fittings. Instead, when preparing
male threaded fittings of the bypass valve, use the following guidelines to avoid damage to the plastic pipe threads.
A. W rap the threads three times with 1/2-inch wide Teflon tape. Place each consecutive wrap on top of the
previous wrap.
B. Use Teflon paste on the first two male threads only to prevent tearing of the tape. The paste lubricates the tape
and fills the small void areas that might exist between the threads. W hen the joint is complete, there will be a
small bead of sealant at the fitting interface, which indicates a properly joined connection.
C. Use a union with a threaded connection to facilitate repair of potential leaks in soldered joints.
D. Prepare the copper tail assemblies in advance to enable them to cool prior to final assembly. Advance
preparation and cooling will prevent heat damage to the plastic pipe threads of the adapter.
E. Ensure that the copper tube is at least 4 inches (10 cm) long.
F. Turn the fitting counter-clockwise until you feel the threads engage and then tighten to prevent cross threading.
Do NOT over tighten the fittings.
Caution: Do NOT allow heat from the torch to transfer to the plastic valve component, which could be
damaged.