Thing I thought it’d take a second or two here and discuss some of the reasoning behind these scaling and why we need to do it who needs to do it and when and so on the answer to those questions are varying depending on what part of the country you live in and so on how your water quality is our company is in the Seattle area and we have some of the best water quality and all united states in our case descaling about every three years for those folks.
Who are on a city water supply every three years is adequate in some cases the water heater will start malfunctioning and it will stop running properly maybe shutting itself down or fluctuating water temperatures that can be an indication that the scale is building up on the interior pipe way through the heat exchanger and so and so on if you have poor quality water or if you’re on a well system you might need to descale you know even in the Seattle area more frequently than every three years and and that’s the point I’m trying to make depending on where you live that will dictate as to how often you need to do this and and what type of solution you need to use I mentioned earlier CLR and I know that’s a very powerful it’s a calcium lime and rust therefore CLR product that dissolves those minerals and so on and if we lived in an area where water quality was extremely poor I might I might tend to use that product we don’t need to use it here if I were going to use a product like that I would certainly take additional precautions to flush the water heater after after use because it’s a toxic subject substance so that’s why I personally don’t like it.
But as I mentioned it it might be necessary in areas where the vinegar might not touch some of the scaling problems you might see in other parts of the country why do we need to descale well it’s like it’s like the old coffeepot trick you know you probably used to pour a little vinegar in at every few months to get that scale off the interior of the coffee pot the same thing goes for the tankless and what’s happening is as we heat water the molecule of the water breaks open enough to where the solid particles will fall out of the water stream and collect whatever they can collect on it if you have a tank style heater these deposits form in the bottom of your tank and that’s what we call sediment in a tankless since it’s flushing it you know constantly there’s really no water being stored those deposits will collect on the interior pipe way of the water heater and and you know then they collect onto each other and so on and so that’s why it’s important to dissolve those particles and flush them through a flush them out of there to keep your system running in top order and to prolong the life of the heat exchanger.
If it builds up too much you know the water the heat can’t transfer through the system the sensors can’t tell what’s going on it can’t keep a steady temperature and so on so it is an important function of tankless water heater ownership and really about the only preventative maintenance thing other than common-sense issues but the only preventive maintenance tasks that you have in the tankless system is the occasional descaling okay it’s been about an hour now you can see the water is turning a nice darker color blue and we’re just about finished here then go ahead and unplug the pump and then what we’ll do is we will close the inlet port handle and remove the hose from the inlet and it’ll just kind of drain back down into the bucket now in this case you can go ahead and reattach the little cap and just make sure like I said that the washer is in there good like like with the hose and tight is all you need on that the valve itself keeps everything off but this is a safety device in case a child or some books were to come along and open the valve up and it I’m going to get blasted in the face so that’s really all it’s for keep the bugs out and so on and now.
What we’ll do is drain this bucket of solution down the drain or out in the and down down the storm sewer or whatever to a safe location okay emptied my bucket and as you can see I put the end of the drain or the return line just into one of my empty with vinegar bottles while I was out draining the bucket I take that return line now and put it down here into the bottom of the bucket we’ve got to flush the heater out and I suppose you could just open a tap in the house a hot water tap and let the water flow and flush there but again the manufacturer’s instructions for this particular model asks you to just do it into the bucket they want you to run 20 gallons through so we’re going to fill this bucket up you know four times and you know dump it out outside you could also hook a garden along garden hose up at this point up here to the to the outlet and run it outside but just to keep things simple.
We’re just going to do it with the bucket here and so we’ll go ahead and and we’ve got that secured in there now this is the wing valve as they talked about we’re just going to crack it open a little bit because if you opened it wide open this hose would be flailing around like a like a snake anyway we’re just going to flush it open it up as much as you can to keep it under control and flush that Eater out with fresh cold water coming from this water supply so I’m going to do that four times and then we’ll go from there one additional step that we need to do with this particular model of heaters we have to bleed this little there’s a little drain port under the heater it’s just to the left of the gas Inlet witches over here with the yellow flexible line this little black port here is just finger tight up in there has a low ring on it with the fresh water inlet on we’re going to hold a little bucket underneath this device and unscrew it about two or three turns.
You don’t want to take it all the way out just enough to get some water to flow through it and let it flush for about ten seconds into your bucket and then tighten it back up okay we’ve drained water out the little black port we’ve got it back closed now and now the next step is to clean the inlet filter on the on the machine this valve body here on the inlet houses a Inlet screen filter that’s attached to this little thumb screw on the end and the first thing you want to do at this point is turn the water back off Inlet cold water is off and let’s relieve the pressure again off the system with the relief valve trip lever we’ll flip the handle out and just balance it like like it is you’ll hear water draining out the line or you’ll see it draining out of that if that isn’t pipe to the exterior like it is here but we know the water is off now trust me if you don’t get the water off and you try to take this out you’re going to have a colossal mess so make sure the waters off relieve the pressure then go ahead it’s just finger tight we’re going to unscrew this thumb screw and pull out the filter now down below here I have strategically placed my little bucket.
If I weren’t filming I’d be holding the bucket right here underneath me of course and catch the water that’s going to come dribbling out so just don’t screw it until it comes out pull it out and you’ll see that our inlet filter is attached to the thumbscrew in this case it’s really clear I was really no sediment or anything and I see a few little flecks in there that I’m going to I’m going to clean out as soon as I put the camera down we’ll go ahead and clean that well and put it right back in there’s no seals there is a little o-ring here right around the rim and you want to make sure that that’s intact because without it you’re sunk so we put that back in and do do your best not to cross that it really goes in very easy if you just try to you know don’t try to force anything it screws right in very easy and you know.
It’s just finger tight when it hits the end so I’ll take it back out and we’ll clean it then I’ll put it back in and we’ll proceed to the next step okay it’s back in good and tight we’ll go ahead and close the relief valve now next we’ll reset the controller by simply turning it off letting it sit for about 10 seconds and then turn it back on letting it sit for 10 seconds or so let’s the diodes inside dissipate and let’s it completely reset if your unit didn’t have a controller on it you can simply unplug the water heater from its power source and leave it unplugged for 10 seconds and that will accomplish the same thing we’ve got everything pretty much ready to go here make some hot water the last thing that we need to do is we need to go back to the gas supply and turn it back to the on position in line is on crossways is off so we’re back on with the gas come over here and open or open the hot out main control.