FarBo® light grey PVC flange outlet with 400mm spigot
Stainless steel flat roof drainage outlet with sealed light grey PVC membrane flange
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Client Technical Services

Fixfast's technical team provides a range of calculations and technical services to contractors and architects looking to purchase or specify our products. You can find out more about these services here, or register a request below.

Rainwater flow calculations

Flow rate calculations for our FarBo roof drainage systems, in accordance with the UK design standard BS EN 12056:3-200.