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This graph estimates the annual gas savings that could

This graph estimates the annual gas savings that could be made when switching to a more efficient boiler as you might expect, the less efficient the old boiler is (g is the lowest rating) and the larger the house is (detached homes need the most heating), the more savings that can be made. Hydro-jets force a powerful stream of water through your pipes the pressure that is created then forces the blockage through the pipes and out so that water can flow through once more this.

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