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£2.50 inc. VAT
£2.08 exc. VAT
The 4mm In-Line non-return valve is designed to only allow the flow of air in a single direction which is important to ensure water is unable to back-siphon down the air hose and into the air pump.
Suitable for use with our range of Pond Air Pumps and our 4mm Black Air Hose:
4mm In-Line (non-return) Air Hose Connector
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