Deprissurising System or Draining - How to Cut to Fit Shutoff Valves All aspects of plumbing questions and answers, help, tips and information

[nichosi]

Hi,

I want to cut insert shutoff valves in the two pipes feeding the shower head. The fotos below show my OZO H/W cylinder system with two pressure cylinders. How to depressurise them to allow cutting the 15ml copper shower pipes?, or do I have to drain the HW cylinder? .........Thanx .......nick

[stoneyboy]

nichosi,
Turn off all mains water into your property and turn on the shower, all flow -hot and cold should stop after a short while therby enabling you to fit the valves. There will be water retained in the pipework so allow for this - turning on the lowest hot and cold taps may drain this down.
end