Technical data

INSTALLATION & SERVICING INSTRUCTIONS
Fig. 6
Fully Pumped Open System - Close Coupled Feed and Vent
MODEL VENT LENGTH
A B
WM 15/30 BFa 230 260
WM 30/40 BF 330 290
WM 40/50 BF 420 330
A - Length Of Dry Vent
B - Length of Water Filled Vent
Vent lengths do not need to be vertical
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