Encapsulation
works by encasing the leaking joint in a mold, filling the mold
with a two part polyurethane sealant and pressurizing it to above
mains pressure by twisting down the mold neck. This action stops
the leak, as gas cannot leak from a low pressure to a higher pressure.
Medium
Pressure molds are made from very high strength, non-stretch
fabric.
They
are pressurized by twisting the necks down with an unbreakable
fiberglass rod.
A vent
is often installed to remove trapped gas.
A gauge
records sealant pressure to make sure that it overcomes mains
pressure.
The sealant
cures to a tough, flexible synthetic rubber that is permanently
adhered to the pipe joint.
Encapsulated
joints are sealed for the lifetime of the pipe. They will
never leak again.
Stock
kits are available for most standard joints and couplings.
Almost
any type of joint or fitting can be encapsulated with a custom
made special kit.
Leaks
at pressures up to 60 psi can be overcome by using a custom
made, reusable metal mold to enclose the encapsulant.
