The value of money depends on installation. If you are paying plumber transport fee + material + labor it costs you some extra if its faulty piece also no installation charges going back. No major engineering technology is involved. Buy just 2 heat resistant hose and a teflon tape. A 3 pin top and s nails top and s nails were not drilling machine. But I made sure your apartment owner is not during installation. Templates were missing in my case. I marked holes first in plain paper and placed paper on wall and nails. Then a plumber is spent only 250 rupees for me to call karenge