For water pretreatment equipment. S €∞uch as:Solar water heaε÷₹ters, electric (gas)₩¥ water heaters, electric hot water hλ ≥★eater;Also applies to the β₽↓pre-pre-extraction o¶εf groundwater in rural ≤♠ ↕areas; Filter:40-60 microns thick↕σ₽ 304 stainless steel
