We have a Y-plan system with indirect tank and non-condensing (13 year old boiler/house).
Have recently cleaned system and added inhibitor (the one advised in boiler manual) as we seemed to have a cycling issue - now gone as far as I can tell. The mid-position valve was also swopped while the system was drained (the actuator was swopped about 6-7 years ago so I still had the new valve.
What I did find is that a length of the return from the HW tank is in 15mm where it disappears back under the floor. What problems might this cause? All the other piping I can see around the boiler and at the mid position valve is 22mm.
Have recently cleaned system and added inhibitor (the one advised in boiler manual) as we seemed to have a cycling issue - now gone as far as I can tell. The mid-position valve was also swopped while the system was drained (the actuator was swopped about 6-7 years ago so I still had the new valve.
What I did find is that a length of the return from the HW tank is in 15mm where it disappears back under the floor. What problems might this cause? All the other piping I can see around the boiler and at the mid position valve is 22mm.
