Back flow may be caused by intense rains, thaw or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory regulations related to technical conditions that are to be satisfied by building codes.
eBay
1Pcs 3 Port Check Valve Brass Internal/Male Thread Return Valve/Check Valve Connector Tool For Air Compressor Solenoid Valve
Aliexpress UK
Back flow may be caused by intense rains, thaw or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory regulations related to technical conditions that are to be satisfied by building codes.
eBay
Pipe Check Valve Air Duct Check Ventilation Check Valve Pipe Draft Blocker
Aliexpress UK
Back flow may be caused by intense rains, thaw or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory regulations related to technical conditions that are to be satisfied by building codes.
eBay
Round Plastic Pipe Check Valve 80/100/110/150/200mm Air Duct Check Ventilation Valve Portable Exhaust Fan Hose Proof Valve
Aliexpress UK
Back flow may be caused by intense rains, thaw or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory regulations related to technical conditions that are to be satisfied by building codes.
eBay
20~50mm UPVC Transparent One-Way Flap Check Valve Aquarium Fish Tank Union Joint Ball Valve Garden Pipeline Drainage Check Valve
Aliexpress UK
Also suitable as rodent deterrents with rat block features. Users also benefit from protection against rodent infestation. The product prevents foul water flowing back from the blocked sewerage systems to flood the property from the inside via toilets, plug holes and waste pipes.
eBay
Toilet Check Valve Male Female Thread One-way Valve 1/2" G1/2 20mm 304 stainless steel Check Valve Durable Hardware Accessories
Aliexpress UK
Back flow may be caused by intense rains, thaw or floods. Use of anti-flooding devices for rooms located on the lower floors is required by obligatory regulations related to technical conditions that are to be satisfied by building codes.
eBay
For 2 Pieces Inline Check Valve One Way Non Return Check Valve Plastic Water Non Return Valves for Water Fuel Gas Liquid Air
Aliexpress UK
eBay
Brass Anti Backflow Check Valve Gold One-way Valve Durable Toilet Corner Valve Ozone Resistance Non Return Backflow Valve
Aliexpress UK
Flood-Guard operates like a check valve to seal off water back-up caused by overloaded sewers. Water flows normally through the drain until the sewer begins to back up. Then the Flood-Guard float rises to seal off the drain opening until the water recedes. A screwdriver and a couple of minutes are all you need to install a Flood-Guard. Once in place, it can prevent property damage and a very messy clean-up job. Gaskets are made of molded rubber, and all metal parts are plated or stainless steel.
eBay
PVC Air Valve Portable 75/110/150/160/200mm Round Check Valve Manual Regulating Valve Ventilation Switch Valve
Aliexpress UK