House was fitted out in JG Speedfit pipework which I was very sceptical about having been a traditionalist copper fan.
Installing monobloc taps on the bathrooms. Tails came with traditional 1/2"BSP. Instead of spending £10+ on a set of Speedfit tails, I used these to connect between the supplied tails and the plastic pipework. No leaks at all (which I could say the same for the isolation valves 32802 which I used on the toilet cistern supplies - these were notoriously difficult to seal)."
"What is there to say about plumbing fittings! They do what it says on the box! Service is good from Screwfix and everything was in stock. Reasonable prices and small quantities available if required."