The HydroFLOW Domestic System Clip on, switch on - that's it. Say goodbye to limescale, choked pipes, boilers and water systems. One unit for all pipe sizes - no plumbing. The activity light shows the unit is protecting your system twenty-four hours a day, seven days a week. No maintenance is required, and no chemicals are involved. Running costs are less than 90 pence a year, and the unit soon pays for itself by fuel savings. 3-year fit for purpose guarantee - money back if not satisfied as per our guarantee enclosed with the products. AquaKLEAR for your swimmingpool Uses less chlorine No fixed chlorine - less smell Reduces backwashes - saves energy Eliminates the need for coagulants Reduces acid for pH control No chemicals or maintenance Works on all types of pipe