For 4 to 5mm pipes.
eBay
For 2 Pieces Inline Check Valve One Way Non Return Check Valve Plastic Water Non Return Valves for
Aliexpress UK
eBay
4/6/8/10mm check valve one way anti-return non return valve for air water ozone aquarium pump
Aliexpress UK
UNIVERSAL ONE windscreen washer valve. For Hyunda Getz 2003-2008 (Rear ). For Toyota 4Runner N210 2002-2009. For Toyota Avalon MK3 2005-2009. For Toyota Camry XV70 2017-2020. For Toyota Highlander 2000-2007.
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6-12mm Non-return Valve Chrome One-way Non-return Check Valve Auminium Fuel Water Gas Air Vacuum
Aliexpress UK
ONE windscreen washer valve. For Toyota Land Cruiser 2008-2016. For Toyota Land Cruiser Prado J150 2009-2016. For Toyota 4Runner N280 2010-2016. For Toyota Camry XV40 2007-2011. For Toyota Corolla 2009-2016.
eBay
6mm/8mm/10mm/12mm Non Return Valve Chrome One-Way Non Return Check Valve Fuel Water Gas Air Vacuum
Aliexpress UK
These translucent, plastic, barbed one-way valves are sprung loaded & made from tough polypropylene. Good UV Resistance.
eBay
8 Pcs 1/4Inch Check Valve 6mm PVDF One Way Valve Inline Check Valve Non Return Check Valve for Fuel
Aliexpress UK
ONE windscreen washer valve. For Toyota Land Cruiser 2008-2016. For Toyota Land Cruiser Prado J150 2009-2016. For Toyota 4Runner N280 2010-2016. For Toyota Camry XV40 2007-2011. For Toyota Corolla 2009-2016.
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Valves Inline Fuel Non Return Check For Gasoline Bio Vegetable Oil Paraffin Oil Kerosene Non Return
Aliexpress UK
TWO windscreen washer valve. For Toyota 4Runner N210 2002-2009. For Toyota Avalon MK3 2005-2009. For Toyota Camry XV70 2017-2020. For Toyota Highlander 2000-2007. For Toyota Prius XW50 2015-2020. For Toyota iQ 2012-2015.
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1-5Pcs 8~20-50mm O.D Inner Plug Check Valve Element Water Treatment Non-return Valve Spool Garden
Aliexpress UK
For 4 to 5mm pipes. 2 x Valves.
eBay
Non Return Valve One-Way Check Valve 6/8/10/12mm For Fuel Air Water Pipe Tube Hose Check Valve
Aliexpress UK