How to completelly overhaul old water heater
Whenever the water heater leaks the question is to fix it or to buy a new one? Most of the people just storm to the shop and acquire the new one or call a service in desperate panic for hot water. But no matter how old it is, if overhauling is done properly it will work well and reliably as well as new. To make that happen, broken non functional parts must be replaced by a number of new parts which require considerable funding.
Considering that criteria, each owner of broken boiler decide what to do, and of course service provider will try to persuade you to buy another fancy one. The comparison will be correct if the remanufactured boiler has all new parts. The only thing that you will retain is its old paneling. To make calculations, "put on paper" don't be lazy and go out to collect the prices of various components, in various shops. Of course, the prices vary from store to store.
Change water tank; Corrosion, over time, eroded its entire inner surface and the hole through which water leaks is only the first in a series of repairs. By the way it's better to buy entirely new tank than to try to fix a old one. Therefore you may happen to weld a tank and after a month it leak again. Today you can get chromium or stainless steel tanks that may leak only if their joints are not welded well.
Choose heater and install it in proper place; Selection of the heater must be adequate. You must install heater whose power is equal to or less than declared value for the water heater. If you install the heater with less power as a result you will have a slower heating but not lower water temperature in the boiler. Usually installed heater is one of 2 kW. Also, in chromium tank you should install only chromium or nickel heater. Copper is not a good choice. Between chromium sheet and copper tube of the heater is created a chemical reaction that leads to thinning of the heater tubes wall. If you do install such a heater expect that you will have to change it with new one every 6 months. Every removing of the heater after a long time requires the replacement of old rubber. In addition there should be three small rubber ring-shaped rubbers in package .Two are used for contacts of the heater and the third for sealing pipe in which probes are placed.
Buy good quality security valves; All security (check) valves are the same structure but not the same quality. Quality valve releases water from the tank only when its pressure exceeds the 8 atmosphere. On the market there are bad valves which leak and release water at the lesser pressure. With these valves you will occasionally ( or always) have a leaking problem depending on the current water pressure in pipes.
Install new thermo regulator; Thermo regulator is factory calibrated to maintain the temperature between 35 and 85 ° C. It is enough to turn the lever when buying from left to right several times and you will needs to hear the closing and opening of contacts. Thermo - fuse has contacts which are in normal position closed. When the water temperature exceeds 90 ° C, these contacts are opened and will not return to its original position even when the water temperature drops. They have to be manually reversed into working position. In very old types this requires a screwdriver and for new it is enough to press a certain key.
Apply insulation; Conductors must be insulated with heat resistant silicone with surface section 2.5 mm2. The average length for the replacement of all the wires in the boiler takes about 3 meters.
Repaint plating; If the plating tank is aged, jaundiced, or you want to make your water heater another color besides white, you can paint it. There is also expensive solution to install tank inside ceramic plating which will look classy but also it will be quite a class of a price.
Tips:
In fact, you do not have to paint the boiler casing if you think it still look decent. You do not need to change thermo regulator or thermo switch if they are correct. This applies to the safety valve also but it is recommended to replace it yet because of accumulated lime in it. Also, you don't need to change conductors if you do not see any visible damage on them. So, the conclusion would be that, in economic terms, certainly it is worth to repair the water heater if you know what you have to and what you don't have to repair or buy.
Warning:
All of the above is quite easy to do if you have boiler which have insulating glass wool. Newer water heaters have isolation in the form of foam and when it leaks you need to buy a new one.
Questions and Answers
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