Tank Overflows Byelaw 30

Screened Tank Overflow Kits and Inline Overflow Fittings

Previously known as Byelaw 30 Fittings, Screened Overflows kits comprise of a Screened Tank Overflow fittings also known as rodent screens, a Screened tank vent and on the larger kits, a screened warning pipe, The screened mesh inside the overflows are made from 316 grade stainless steel and are WRAS approved.

Potable Water Storage tanks should have Screened Overflows to comply to regulations to prevent insects etc. from climbing into the tanks and contaminating the supply.

The size of the overflow on a water tank should also be at least twice the inlet size on the tank, this is due to the Inlet flow rate being greater as it is under pressure from the mains and the overflow’s flow rate would only be gravity feed.

Range of Screened Tank Overflows Kits (Polypropelene)

  • 3/4″ PP Screened Overflow Kits.
  • 1″ PP Screened Overflow Kits.
  • 1 1/4″ PP Screened Overflow Kits.
  • 1 1/2″ PP Screened Overflow Kits.
  • 2″ PP Screened Overflow Kits.

All Overflow Kits come with a Screened Tank Vent and Overflows above 3/4″ are supplied with a 3/4″ Screened warning pipe.

The Overflow fitting has easy access to the screen to enable the fitting to be checked and maintained from time to time

Large Tank Overflows Byelaw 30

Large Tank Screened Overflow Kits and Inline Overflow Fittings

the Inlet flow rate being greater as it is under pressure from the mains and the overflow’s flow rate would only be gravity feed.

Range of Large Screened Overflows Kits (PVC)

  • 2 1/2″ UPVC Screened Overflow Kit.
  • 3″ UPVC Screened Overflow Kits.
  • 4″ UPVC Screened Overflow Kits.
  • 6″ UPVC Screened Overflow Kits.
  • 8″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 10″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 12″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 14″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 16″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 18″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 20″ UPVC Screened Overflow Kits (Stub Flange Only).
  • 24″ UPVC Screened Overflow Kits (Stub Flange Only).

These Large Tank Overflow Kits come with a Screened Tank Vent and a 3/4″ Screened warning pipe.

The Overflow fitting has easy access via the top Cap to the screen to enable the fitting to be checked and maintained when required.