dropping pressure

hi my mira advance alt when i first turn it on its got good pressure after a short time the pressure drops of can you help.
Asked 7 years ago by Keith
Check your head , hose and inlet filter are clear, and if so you may have a faulty www.showerdoc.com/mira-advance-flow-valve-assembly-1643-149
Mira recommend changing this and the www.showerdoc.com/mira-relay-board-and-wire-75-pack-406-88 together.

Answered 7 years ago by Barrie Seabright

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