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Screened Cowl Vent for tanks with walls up to 10mm thick

Part Number VP400-010M

Description

Grey PVC vent with insect screen. 4 inch BSP threaded shaft, fitted with two PVC nuts, one with a conformable foam washer. Grey PVC cowl over screen.

This is one of a range of 4 inch BSP fitting screened cowl vents from Norscreen to exclude insects from water storage tanks, in accordance with paragraph 16 of Schedule 2 of The Water Supply (Water Fittings) Regulations 1999 [previously required by Water Byelaw 30(2)]. This size is intended for use on uninsulated tanks. To ensure an adequate flow of air on insulated tanks, use the VP400-060M or VP400-090M, which have longer shafts.

Cowl Vent Fitting

The vent is easily fitted by following the instructions below:

  1. Drill a 115mm diameter hole in the tank lid at a convenient point, to accommodate a 4 inch BSP thread.
  2. Fit the tank connector through the hole from above, ensuring that the nut with the sealing washer is on the threaded part before doing so. Secure from inside with the nut that has no sealing washer.
  3. Take care not to over tighten the nuts.

Maintenance

The stainless steel screen should be inspected and cleaned periodically and replaced if necessary.

To access the screen, twist the cowl vent cap anti-clockwise and lift off.

Note: The screens are manufactured from stainless steel mesh and may have sharp edges. It is recommended that gloves are used for protection when handling the screens.

After cleaning, the screen should be carefully seated in the recess in the screen carrier.

To replace the lid, engage the two lugs on the screen carrier into the slots in the cap. Press the cap down gently and rotate clockwise until it clicks into position.

Replacement screens are available

Specification

Moulded parts: Grey ABS

Shaft: BS 3505 uPVC Class E pipe

Screen: Type 304 stainless steel 57 micron mesh

Associated Products

4 inch BSP Cowl Vent for tank wall and insulation up to 60mm thick Part Number VP400-060M

Grey PVC vent with insect screen. Extended 4 inch BSP threaded shaft, to accommodate insulation up to 50mm thick, fitted with two PVC nuts, one with a conformable foam washer. Grey PVC cowl over screen.

4 inch BSP Cowl Vent for tank wall and insulation up to 90mm thick Part Number VP400-090M

Grey PVC vent with insect screen. Extended 4 inch BSP threaded shaft, to accommodate insulation up to 80mm thick, fitted with two PVC nuts, one with a conformable foam washer. Grey PVC cowl over screen.