Not sure whether this is allowed under the regs, but just how competent does one have to be to fit a new one of these, and how easy is it to get the part. Fitting instructions seem straightforward enough and it doesn't interfere with anything major or dangerous from what I can see. Wouldn't mind but this didn't leak until recently after a service. Didn't notice it straight away as the boiler is in the loft. Now the bottom pipe isn't connected to the trap at all and the fitting is broken. Any advice appreciated, even if it's not to bother trying to do it myself. Many Thanks. Steve.