Here at Freeze Master we are an established company set up specifically to manufacture pipe freezing machines. Instead of squirting gases onto pipes, which will end up in the atmosphere, Mr. Hallett opted to develop an electric, motorized, portable refrigeration machine which would not waste the gas into the atmosphere and would also freeze pipes for an indefinite period. Freeze Master machines can provide a new safe technology to the plumber and have revolutionised the plumbing and heating industry. Contractors are now able to carry out repairs and alterations to entire water systems quicker, more efficiently, and more profitably than using the old fashioned methods. It is not unusual to find stop cocks which are in a poor corroded condition and are therefore unusable. It is also not abnormal to find in a large building whole floors, or even blocks of flats, which operate from one main stop cock. A drain down could involve troublesome airlocks to happen several days after the refill. The plumber may spend several hours, unpaid, chasing them around. Using Freeze Master machines to make a temporary ice block in the pipes is the most professional method to carry out work causing the minimum amount of disruption to the system.