The supply of water and energy is one of our most critical National problems. If we cannot increase our supply, then it's imperative to reduce our consumption. Fortunately it has been proven that we can conserve dramatically and in a manner, which will not seriously affect the lifestyles we have become used to.

Water and energy conservation are so intimately intertwined that they are practically synonymous. Any reduction in the usage of water will automatically result in a reduction of the use of energy. What this means, therefore, is that our whole philosophy on the use of water is changing and we are finally recognizing that we have been water rich over the years and it is now time to get back to reality by adjusting to our actual needs and to practice good conservation principles. In the UK mains water pressure varies considerably; older properties that have, not had, their mains supply upgraded may have less than 1bar of pressure. This is insufficient for most modern appliances such as the combination central heating boiler, which requires water pressures of above 1 bar to operate and receive an acceptable flow rate of water. At the other extreme, where for example a new water main has been laid to service a new development such as a new Hospital or commercial estate, water pressures could rise to above 10 bar, this may cause damage to older existing installations due to the stress caused by increased water pressure on pipework and joints. The average mains water pressure tends to be around 3 bar during the day and slightly lower at peak usage times. However as usage drops during the late evening and early hours the pressure rises, and has been known to exceed 10 bar. A pressure-REDUCING VALVE acts as a buffer between the high water pressure supply and the system or appliance. The mains water pressure is reduced to the safe required level during flow or non flow conditions. Also called water pressure reducing VALVEs they are compact, inexpensive regulators that perform two functions: (1) they automatically reduce the high incoming water pressure from the water mains to provide a lower, more functional pressure for distribution in the home; (2) they "regulate" by maintaining a set pressure in the home usually 50 Ibs. thereby insuring that the home piping and appliances operate under a safe, more moderate, but satisfactory pressure. The Watts DRV15E is a compact pressure reducing valve for domestic plumbing systems. 15mm compression fitting. Brass body. Nbr diaphragm. High impact plastic bonnet. Max. supply pressure: 375psi (25bars). Max. outlet pressure: 90psi (6bars)* Operating temperature range: min. 1