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GEOFLOW,;INC http://www.geoflo ;com/wastewater/Operations%20a... <br /> FREEZING OPERATIONS <br /> Buried drip systems are not prone to frost damage because, in their design, vacuum <br /> release and drain valves are provided. Please adhere to the following precautions: <br /> a) Manifolds, supply lines and return lines must be sloped back to their <br /> respective dosing or treatment tanks. Under extreme conditions return and <br /> supply manifold should be insulated.or buried below frost line. Be sure drain <br /> valve on flush line remains open long enough for entire field to drain. <br /> b) Remove the check valve at the pump or provide alternate method for <br /> draining supply manifolds. Check Frith pump manufacturer before <br /> p .P. ..._.-� feet warranty. <br /> removin check valve From ump to be sure that It does not af..,._ <br /> c) Insulate equipment boxes, including Headworks box or filter and field flush <br /> valve boxes as well as zone dosing valves, pressure regulator and air vacuum <br /> relief valves. Use closed-cell insulation such as perlite in a plastic bag. <br /> d) The top of air vacuum relief valves must be no higher than soil surface. <br /> e) If using an index valve to split field zones, be sure it is capable of <br /> self-draining. <br /> f) WASTEFLOW lines will self-drain through the emitters into the soil. <br /> If the cover crop over the dripfield is not yet adequately established, add hay <br /> or straw over the field for insulation. <br /> g) Mark the valve box with a metal pin so you can find it in the winter when <br /> covered in snow. <br /> h) If using manual filter flush valves or manual field flush valves, they should <br /> be left cracked open slightly to provide forgluck and complete drainage of <br /> the flush line in freezing conditions. <br /> SYSTEM MAINTENANCE: <br /> The best way to assure years of trouble free life from your system is to consistently <br /> monitor the system and perform regular maintenance functions. For large systems <br /> or,systems with a BOD > 20 mg/1 automation of maintenance is essential. For <br /> smaller systems with a BOD c 20 mg/1 semi-annual inspection and maintenance is <br /> adequate. <br /> 1) Remove the spin filter and install a clean cartridge. Clean the used filter <br /> cartridge back at the shop with a pressure hose. The filter cartridge should be <br /> cleaned from the outside inwards. If bacteria buildup is a problem we advise <br /> first trying lye, and if the problem persists, soak it in a chlorine bath. Soak the <br /> filter cartridge in a mixture of 50% bleach and 50% water. <br /> 11 of 12 8/19/2003 2:50 PM <br />