We have laid the first 3 ground loops and are now in a position to cover them back over. Each loop is 50m and there is a layer of sand below and above the pipework. The subsoil is then carefully reinstated avoiding any very large stones.
There is a flow and return for each of the loops. Each loop has a tap that controls the flow to and from each ground loop. This allows the flow to be controlled to each loop compensating for the fact that some of the loops are further away from the pump.
Each pipe is 100m long, so each loop is 50m. Each of the manholes has a 6 port manifold so that is 600m of pipe connected to each manhole. There are 3 manholes making a total of 1800m of pipework.
The first 300m of ground loops are being covered using some of the subsoil that we removed earlier in the week.
There is around 100mm of sand on the bottom, then 100mm of sand on top of the ground loops. Then the subsoil is carefully reinstated.
The first 300m of ground loop disappearing under the subsoil.