Backflow Prevention Valves (non-return valves) effectively secure any rooms located on the lower floors against flooding caused by back flow of storm water and sewage. Back flow may be caused by intense rains, thaw or floods. BS8515 recommends the use of backflow prevention valves for underground rainwater systems.
The flap’s protecting guard as well as all mounting elements (screws, nuts and washers) are made of chromium-nickel stainless steel type 0H 18N9.
The shape of the protecting guard and gasket has been designed to protect against damage of the gasket by rodents and sliding during sewage flow.
Backflow Prevention Valves are equipped with a manual closure lever. It enables protection against unpleasant smells in case of longer breaks in household sanitary system use.
We're a Manchester based company and ship to the UK at our standard rates. Please get in touch if you are based the Highlands or a UK island.
We also ship all filters, diverters and accessories to the EU at standard rates which can be seen at checkout. For larger items or quotes for other destinations please get in touch.
We will ship all small items (<2kg) Worldwide.
Stock items will be dispatched on the day of order, if ordered before 1pm.
Bulky items (pallet delivery) are dispatched within 2 working days.
Some items are made to order and details are given on the listing for dispatch times. If for any reason we anticipate a delay on our normal dispatch time we will contact you to let you know.
Occasionally there are delays we shall not be liable for any direct or indirect losses, costs, damages or expenses incurred by you or any other person for any delays in delivery.
We are an environment centric business and as such we try to minimise our waste. Our packaging is usually recycled and we make efficient use of packaging to minimise wastage.