Welcome Stan......without knowing any detail of a
WLD System, it would be difficult to offer any real constructive comment
An axial water pump for model applications, and to work against your boiler WP, would be interesting
Another consideration with NC solenoid valves for model applications is the
holding current required
Best try & make contact with the supplier [Bil Ford], or come back with the full detail of what your plant includes and the intended configuration
Derek