DN20 Ball Valve Exp.Vess. Large Drain Tap Union

£65.00 £78.00 inc. vat

In stock


Wire locked Ball Valve for Expansion Vessel with female union connection and swivelling drain tap. Allows the vessel to be isolated and drained for essential periodic air recharging.


Isolates Expansion Vessel enabling draining and air recharging.

Product Specification
  • Backflow Prevention No
  • Powered No
  • Size DN20
Specification Clause

Every Expansion Vessel shall be fitted with an Expansion Vessel Isolator to enable draining and air recharging – model BVEV[1] – as distributed by Arrow Valves Ltd – Tel 01442 823123 www.arrowvalves.co.uk. The valve shall have a lock shield cap and be capable of being wire locked. The assembly shall include a small bore plastic drain tap[2]. The valve shall be a vented spherical type with a brass body and union connection to the vessel.

Amend as required
[1] BVEVL (for Large bore brass drain tap)
[2] large bore brass drain tap

Data Sheets


evcpdatasheet_37.pdf (241.29 KB)