Systems Guide - Design
Shop related parts: Filters
Sometimes a canister filter and an adjustable pressure regulator are
installed on the supply line leading to more than one automatic valve
with each control valve controlling a separate circuit. Be sure that
the casing of the filter is strong enough to take full, constant water
pressure, and use an adjustable brass pressure regulator.
Also, if installing a fertilizer dispenser ahead of a manifold of valves,
a reduced-pressure vacuum breaker is usually required. If you have any
questions regarding what backflow requirements are in your area, give
your local water company a call. You will also want a shut-off valve
upstream (ahead) of the entire head assembly to facilitate working on
the individual electric valves should they require maintenance, or to
facilitate draining and filling the fertilizer dispenser.hink.