mira sport prd
The PRD is a red ball which fits into the base of the heating tank, the red ball was used on an earlier model of shower and is still available in it's old housing so the ball can be taken out of this and fitted to your shower.
Be careful when fitting the red ball that you don't push up into the heating tank.
www.showerdoc.com/mira-relief-valve-assembly-spares-147-50
Answered 5 years ago by George Thomson
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Mira Sport - post 2011 Shower Spares
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