GRP Tanks

GRP Below Ground Tanks

RHI Water supply a wide range of below ground rainwater tanks, in a choice of materials. The GRP tanks are available in volumes up to 200,000 litres. All our GRP rainwater tanks are supplied pre-fitted with a calmed inlet and an overflow. The rainwater tanks are provided with a wide easy access 750mm access to aid M&E install and future maintenance. 2No. duct connections come as standard for electrical and water connections as standard.

Advantages of GRP Tanks

  • GRP (glass reinforced plastics) tanks are light, easy to handle and install.
  • GRP is not susceptible to rust, exhibit excellent corrosion resistant properties.
  • The tanks have a life expectancy in excess of 50 years.
  • Tanks have been designed with reference to BS 4994:1987, BS EN 976-1, 978 and BS EN 858-1:2002.
  • GRP tanks have a 25 year Warranty.


  • Rainwater storage
  • Stormwater attenuation
  • Fire fighting sprinkler reservoirs
  • Potable water storage
  • Settlement tanks

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