Check-Flex Limited
About
Measurit Technologies Ltd, trading as Check-Flex, is an Ireland-based manufacturer of rubber check valves serving the UK and Irish markets for stormwater management and flood prevention. The company produces seven valve models across six connection styles, spanning diameters from 18mm to 3000mm. Core products include the Check-Flex inline check valve and the Tideflex duckbill check valve — both operate without external power or maintenance, relying on passive hydraulic pressure differentials. Three injection-moulded small-valve series — the G5-RESI (residential), G5M (medium-duty), and G3M (compact) — offer cost-effective backflow prevention at smaller diameters. The Residential SSL valve targets household drainage connections, while the AHU small duckbill valve serves HVAC condensate lines. For bespoke projects, the GuvNu valve line provides custom-engineered solutions. Check-Flex also distributes complementary products including effluent diffusers, Mosbaek flow regulators for combined sewer overflow management, and the SL-RAT acoustic pipe inspection system. Elastomer options include Chloroprene (Neoprene) as standard, with EPDM, Nitrile, and Viton available for aggressive chemical or high-risk environments. Metal hardware uses 316L stainless steel (EN 1.4404) standard, with Super Duplex upgrades for marine service. All products carry ISO 9001 certification with IAF accreditation, and hydraulic performance has been independently verified at Utah Water Research Laboratory.
Key Products
Rubber check valves installed inline within pipework to allow forward flow and prevent backflow in stormwater and wastewater systems.
Flexible rubber valves that open with forward flow and seal tightly to prevent backflow, commonly used in outfall and tidal applications.
Injection-moulded residential check valves for smaller pipe sizes, offering lower production costs for domestic and light commercial drainage applications.
Injection-moulded check valves for medium-duty applications, providing cost-effective backflow prevention with the same rubber duckbill principle.
Compact injection-moulded check valves for smaller diameter installations requiring reliable backflow prevention.
Small-scale check valves designed for residential drainage and flood prevention, preventing sewer backup and tidal inflow at household connections.
Compact duckbill valves for air handling unit and HVAC condensate drainage applications, preventing backflow and odor ingress.
Custom-engineered check valves designed to specific project requirements for specialized flow control applications.
Tideflex diffuser nozzles that mix effluent with receiving water for improved dilution at outfall discharge points.
Flow regulation devices that control discharge rates from stormwater storage and combined sewer systems to prevent downstream flooding.
Acoustic inspection technology for assessing pipe condition and blockages in sewer and stormwater networks without direct visual access.
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