I just had the 5th failure of a Caleffi 573 double backcheck with service of less than 1 year. Is anybody else seeing a trend? We switched to them for use with mod/cons to boost the pressure set above 12 psi...which is standard to a Watts 911 our favorite. That being said, I would rather have a boiler flaking out for the psi balance than have a leaking check.
No announcement yet.
Double Backcheck w/ Atmospheric Vent???