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And again we return to two types of sewer valves: check valves and air valves (vacuum or in other words, aerator). In the new video, the topic is continued. ☝ Part one: • Check valves and air valves... Now about the installation rules 🛠with examples. We tried to tell you succinctly and briefly! ✔Why you can't install a check valve sideways or vertically❓ ✔Can you install an aerator in an unheated attic❓ Answers to these and many other questions about installing valves 🔧in our new video. By the way, at the end we supplemented the theory with visual examples👀. Recommended retail prices for RTP sewer valves in our price list: https://rosturplast.ru/catalog/price3... For wholesale inquiries 📞 8 (495) 540-52-62