Hydraulic ram pumps and Sling Pumps

operation, see Fig. 5.18. After you have finished, cover the inside again with plastic like you did theday before.figure 5.18Now remove the cloth from the outside and start plastering as for the inside, but not more than 10mm thick. Fill the sags and level them with the bulges, Fig. 5.19. Do not float. Allow the plaster to set(about 1-2 hours). After this job is finished, which can be done simultaneously with the inside plasterlevelling, Fig. 5.18, cover the wall outside as well as inside again with plastic and keep covered for atleast one night. Make sure the plastic cannot be blown away. Secure it with sisal string and stonesas indicated above.figure 5.19The following day remove the plastic from the outside first. Throw on a light coat of plaster about 10mm thick. Then smooth it with a wooden float until the entire outside is a smooth plumb wall. Duringoutside plastering, prepare the overflow. Choose the place carefully. Under no circumstances shouldthe overflow be at the same side as the tap. It is advisable to locate the overflow at a side where aslope (even a slight one) directs the flow-off away from the tank Make sure the water does not flowtowards the house. With a hacksaw, cut the horizontal wires of the reinforcement mesh. The size ofthe opening should be slightly larger than the downpipe filling the tank. Bend down the piece of walland wrap with several pieces of chicken wire. Place a flat board under the overflow and use one ortwo posts to support it. Plaster the top and smooth it. With the plaster form a gutter-shape, round orsquared, whichever is easier. Do not cut through the top wires. This reinforcement is needed tokeep the circle together, Fig. 5.20.40