8
4. Place the valve shaft
Make sure that the top edge of the closed lid
5. Open the lid
of the valve shaft
12
6. On each side, screw a connector (art. 2758)
10
9
on the coarse gravel layer
10
.
10
11
.
11
of the valve shaft
12
finger-tight onto the connectors (art. 2763)
9
– 18 –
12
9
8
is even with the ground.
10
.
8