Review on Uniweld Products VV1 Uni Weld Fitting by Peter Green

Very impressed with the quality. Looks a lot better than in the picture. There is safety glass on both sides so you can go to the other side. OK. Looks very durable. So far it has been used in 4 HVAC systems to fill both R22 and R410a. Works perfectly. The pressure is adjusted quickly, instead of pumping liquid into the vapor line, the refrigerant is already in vapor form. However, you cannot go crazy and open the valve full throttle and dump the refrigerant into the system as this will only cause the refrigerant to boil/flash if the refrigerant is slowly added. . But using this product really speeds up the process and helps not to overload the ventilation and air conditioning systems.