Continuous running water is a common fault with the modern push button toilet cistern.
Scale or torn washer on the push button flush syphon. isolate the water supply and repair or clean the syphon. Normally, a sharp twist anticlockwise on the push button syphon will release it. Turn the...
You need a vent on the main soil pipe, having the smaller waste pipe tee into each may not be good. They are best to connect to the main soil pipe separately.
You cant do that. The anaconda and ecv should be with the meter. The anaconda cant pass through a wall, you should be able to inspect the whole length.
The heads on those valve should pull off easy and change with a new one.
Check the pin moves freely on the valve body, if it doesnt then that may be the problem. The override button only works if the receiver and thermostat have lost connection. You would see a solid red light on the receiver...