not for this as its not actually fitting anything. it was just a case of turning on tap A and tap B for about 5 secs to allow water through. Its even in the boilers manual as a DIY job
tools were in car, my car started 1st time (for once) 2 mins up road, not chit chat, straight to boiler. Turn on 2 taps, lap up praise drive home via shop that i had to goto anyway, sit here talking to you all with a cold beer and a good deed done.