The Kwikflow NON RETURN VALVE (NRV) / protection against
The Kwikflow NON RETURN VALVE (NRV) / VERMIN BLOCK (rats etc.) Non return valves can be ordered to fit Pipe Diameter: 110mm 160mm 200mm NRVs are designed to protect properties on lower levels against flooding caused by backward flow of storm water and sewage. the NRV is effective protection against vermin (rats etc.) entering the building. These devices are fully self-activating. NRVs are equipped with O-rings which effectively keeps the valve in place NRVs can be installed at the outfall of sewage pipes entering manholes, cesspits, septic tanks or drainage pipes leading to storm drains, ditches or rivers. If you would like a price to purchase or for us to install call Dave on or Kwikflow office on we can also offer you CCTV drainage surveying, drain jetting, blockage clearance and sewer repair.