Automatic Differential ByPass Valves - Angled Pattern Pattern:Angled It should be noted that

It should be noted that where any stainless steel flexible liner is used within a chimney previously used to serve solid fuel appliances

Brass Bottle Type Air Vent Incorporating a Sprung Loaded Isolation Valve

McAlpine Slim Shower Trap Technical Data Sheet

The Liner can avoid structural alteration of straight and offset chimneys

Automatic Differential ByPass Valves - Angled Pattern Pattern:Angled It should be noted thatDESCRIPTION: This valve is very effective in systems where various heating loads may simultaneously be excluded from the circuit by the closure of zone control valves and thermostatic or manual radiator valves. It ensures a recirculation proportional to the number of valves that close, thus avoiding noise whilst at the same time maintaining the pump head pressure at a constant value. Fitted between flow and return, it helps prevent unnecessary cycling