RainTech® FT tanks with integral filter
Underground GRP tanks with integral filter
Raintech filter tank
RainTech® FT tank/filter combination. The larger of the two shafts houses a HYDRAPRO® FT filter orientated to suit site layout. The total invert drop across the complete unit is only 80mm
filter shaft
View down inside the extra shaft containing the HYDRAPRO® FT filter unit. The shaft has a full solid base and access ladder for safety.

Tough British made one-piece GRP tanks suitable for underground installation manufactured to BS 4994 with integral HYDRAPRO® FT filter unit built in to a separate access shaft on top of the tank. The tank overflows back through the filter unit, to keep the invert loss to only 80mm. The filter unit has the added benefit of an advanced self-cleaning mechanism as standard.

These underground GRP tanks are strong and lightweight, and are easy to install in most ground conditions with concrete backfill for a secure permanent installation. Where ground conditions permit, a heavier duty version can be used with a granular backfill material. Supplied as a complete unit ready for quick installation.

Advantages include:

  • Minimal invert drop (80mm)
  • Pre-fitted filter unit
  • Lightweight
  • Easy to install
  • Cost-effective
  • Supplied complete with fitted stainless steel flow calmer and unique anti-backflow overflow unit
  • Can be used in trafficked areas with cover slab
  • 10 year warranty

Sizes available: Any of our RainTech® or RainTech® Pro tanks can be supplied with this option.