£5.00
Deva NRV15 Brass Non-Return Single Check Valve 15mm Compression Fitting 1 Way Prevents Water Backflow Hot Or Cold for Showers Toilets and Outdoor Taps Anti Corrosive
View at Amazon.co.uk
£5.09
Flomasta Double Check Valve 15mm
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£4.99
Plumbstation 15mm Double Compression Check Valve (1)
View at Amazon.co.uk
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