picturegram instructions suggest the pressed steel spanner like object in the photos can be fitted on the adjuster shaft as per TCV1, trouble is it doesn't fit. The 'spanner' has a rounded ends oblong hole in it, the shaft the diagram shows it to go on is splined. The only words next to this particular diagram are 'use the adjuster tool in the box'. Use it how and what for?
The blue cap can be tightened down to lock the setting or left loose to allow adjustment of temperature, so what is the 'spanner' for?
It is a Watts temperature controlled mixing valve by the way. I'm intending to fit it to a toilet wash basin so I can remove one tap and just have one left with water coming out at just the right temperature.
Fed up with too hot water coming out of the hot tap and too cold coming out of the cold tap.
Presumably there is a machine screw into the end of the shaft that holds the blue cap on?
Make people ask questions?
Seems redundant to me. Are there no flats on the adjustment shaft it will fit? Just maybe it's to adjust things if you take the element out of the valve body?
Yes. If you partially unscrew the cap screw, you can lift the blue cover to adjust the setting and it clicks as it is turned.
The 'spanner' is shown on the shaft in the diagram, as in my photo. There are no flats on the shaft, it has a small diameter splined section, which matches the blue cap, a groove, then a lager diameter spline which doesn't seem to have a purpose. The 'spanner' will only pass down the shaft as far as the bottom of the smaller spline.
No that is a different unit. Mine is the MMV Compact and as said, the diagram shows it fitted on the temperature adjustment shaft. As also said it will fit on the shaft, but there is nothing for it to locate onto and the blue cap could not be then fitted with the 'spanner' in place.
Without the 'spanner' it would all seem as if it should function. It just makes no sense and I like to make sense of things before I start the job.
I think they've just packaged the wrong spanner. Obviously you just have to turn the splined shaft to dial up your desired output temperature and the "lock" it with the blue cap.
Alternatively, cut the bottom of the blue cap off so that it can't lock and you'll have a handy adjusting knob. Probably illegal but who's going to know?
Or trim the little bit of blue plastic at the top of the hole, and use the blue cap upside-down to adjust. Then fit right-way up to lock. OK so the ability of the screw to hold it tightly might be slightly compromised...
The shaft shown in Fig 5 doesn't look like a spline - it looks like the right shape for the spanner. Maybe they changed the design but continued to supply the (no longer appropriate) spanner?
Am I right in assuming that the black bit above the grey body rotates with the knob - but has it motion restricted somehow to less than a turn, corresponding to the knob's max to min range?
If that is so, am I right in assuming that the shaft can be rotated through a much bigger angle when the knob is removed?
If that is so, presumably you have to turn the shaft to an appropriate position in order to adjust the *actual* temperatures corresponding to max and min. Do the instructions describe the adjustment procedure?
My home had one of those under every hot tap when we bought it. I've removed most of them. Tried selling them on Ebay but only made 99p each so gave up!
The ones I have are pre-set to a temperature with a spanner like tool (only have one of them) then the plastic cap is fitted and prevents the temperature being altered.
My photo is slightly blurred, looking at the original it looks like splines.
No, only the brass centre turns, the black bit is the top section of the body.
It matters not whether the knob is on (providing the screw is undone enough to free it from the locked position) or not, the spindle can be turned several times around.
It can be adjusted all the way from cold inlet temperature to the maximum of the hot supply temperature, or any point in between, but not much in the way of instructions.
I think the spanner has to be for a different model, one with a preset rather than adjustable temperature.
Point is, it is working great and I've managed to make it fit in quite neatly. Problem was we like our hot at 80 C and putting the plug in for a quick hand wash was a pain, plus the toddlers are starting to use it. Because of the above, it was easier to use the kitchen or util sink, so it didn't get much use. Turning one tap on at a pre-set temperature is much faster, much safer and no doubt it will get used more now.
We like the hot water hot, apart from this one wash-basin in the downstairs toilet, which is only used for quick hand washing. It seemed daft to have both hot and cold available, when a preset temperature could be arranged from one tap, without the bother of using the plug in the basin.
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