Flap Valves

Althon manufacture and distribute flap valves in HDPE, cast iron and stainless steel. Flap valves and flap gates are a type of non-return valve (NRV) used to prevent flooding and to stop water back-flowing up pipework connecting into ponds, ditches, swales, rivers and marine or tidal environments.

Our range of flap valves and flap gates includes wall mounted flap valves, tidal flap valves, flange mounted flap valves as well as push fit and pipe mounted flap valves. As standard our HDPE flap valves have a 50 year design life. Althon HDPE flap valves can be manufactured to suit site specific installation requirements and operating water pressures.

We are able to design and manufacture bespoke flap valves for square, rectangular or elliptical openings or provide additionally reinforced ballast flap valves for when the valve is subject to wave action.

Althon flap valves can be factory fitted to our precast concrete headwalls and chambers. For installation on site we supply with our flap valves an EPDM seal, stainless steel fixings and chemical anchors

If you require any assistance or more information please contact us by phone on 01603 488700 or by email sales@althon.co.uk

Circular Flap Valves

Circular flap valves in HDPE with stainless steel fixings. Wall mounted flap valves 5Mwc for 72 hours 1Mwc for 72 years.

Tidal Flap Valves

Tidal Flap Valves as suitable for installation under water and have a design life of 50 years. Max 5MwC

Flange Mounted Flap Valves

Flange mounted HDPE flap valves 5Mwc for 72 hours 1.3Mwc for 50 years. Options for PN10 and PN16.

HDPE Flap Valves 100-500mm

Althon HDPE Flap Valves can be used in Surface, Sewer and Water Processing Applications. Max 5MwC

HDPE Flap Valves 600-1500mm

Althon HDPE Flap Valves can be used in Surface, Sewer and Water Processing Applications. Max 5MwC

Ductile Iron Flap Valves

Ductile Iron Flap Valves are for use in Industrial Effluent, Water Treatment Situations & Protected River and Sea Outfalls

Althon PTK-BS Pipe Push Fit HDPE Flap Valves

Althon supply a range of HDPE Push Mounted Flap Valves from 300 – 1000mm. The tapered spigot is inserted into existing pipework. Max 5MwC

Althon PTK-P Pipe Mounted HDPE Flap Valves

Althon supply a range of PTK-P Pipe Mounted HDPE Flap Valves from 100 - 600mm. These can be coupled onto existing pipework. Max 5MwC

Fish Friendly Flap Valves

Althon can manufacture fish friendly flap valves to suit site specific requirements.

Althon Bespoke Flap Valve

Althon can manufacture flap valves to suit site specific requirements in HDPE, galvanised steel and stainless steel.

Flow Control & Flood Prevention

Althon offer a range of specialist water management and flood prevention products such as HDPE flap valves, ductile iron flap valves, penstocks, Wastop inline non-return valves, stop logs, Tideflex duckbill and Checkmate valves. We offer flanged, wall mounted and tidal flap valves as well as wall mounted and inline penstocks.

We can factory fit most of these products to our precast headwalls or precast inspection chambers if required.

Stop Silent Light Valves

The Stop Silent Light is an inline non – return valve to prevent backflow in sewer systems and pipework