Are you meant to have the black knobs turned to "open"? When would you have them on "closed"? I can't tell any difference between the two.
1791967
Open for normal breathing while working. Closed in extremely dirty environments for short periods.
1791968
The open and close positions referenced on the knobs do NOT open or close the valves. The open position allows for the easy disassembly of the two parts of the knob, allowing to remove the Active Carbon Filter for washing or cleaning purpose.
1791969
I've wondered the same thing. The instructions do not even mention those knobs. I hope that Warren G.'s answer is correct... I found no explanation searching online...
1966261
Has anyone figured out if reversing the focus direction is possible yet? It is currently counterintuitive with my setup (rotating the top of the knob away, focuses closer, but it would be intuitive for this to focus further). Thanks!
2199241
I would be worried that you messed something up during the building process. It is a very significant difference for me when I turn in the knob.
146062
You can turn it face down, but you will need to swap the hot/cold knobs so they read correct. Easy to do. I should have done that.
1000643
You can put a small lock & lock them. Once the knobs are put through the holes they turn so they don't fly open & the velcro works really well...so if you forget to turn the knobs they still won't fly open.
1416075
There is a little knob right above the handle that is an on and off valve.... Turn that... Mine came in off position.
675230
Just the nob turns and locks. If you hold the clear plastic piece and turn the black nob left and right it will lock and under lock. I guess it's for cleaning purposes.
81163
Ours you shut by pushing closed. they don't soft close, but don't snap either.
553953
Mine came with a T-knob. It seems the picture has changed since I ordered them. That knob almost looks non-functional the way it is now.
1906994
The light colored knob has to be turned all the way closed. It has fiber washers that allow air to go through, but seal when wet so water does not come out. I have these plus I bought the larger brass ones. I think the larger ones work better. The little knob on those you open one turn.
2054636
The black knob comes off. Do not twist or turn - lift straight up. It pops off to reveal the nut that you loosen for chain adjustment. Where the chain goes in the body at the bottom is a screw. Loosen or tighten the screw to adjust chain tension. Then re-tighten the nut to hold the tension. Put the black knob back over the nut. You're ready to go!
1157579
Mine did that, but I discovered that you had to make a selection with the knobs first. (Plugging it in helps, too!) :)
62988
Same thing has happened to me with this light as well as several different lights over the years. It may be normal, anyway there is a black knob that you can turn not too far away from the power switch. Turn the light on and turn the knob until the light comes on.
925544
My set came with both knob and lever so homeowner use whichever they preferred. However I used lever as it (shown here) if you bought new, you should still have the knob somewhere, pull it out put it on.
94870
I had this problem in the beginning when i first got mine. All of the parts twist and the black thing inside... sorry i don't know what it is called but that could be a little difficult to get out it took me a little bit the first couple of times. Try twisting until it fully comes off. I think you twist to the right to get the parts off and to the left to lock them but not 100%.
1010634
This has never happened to me. I just checked the knobs and they work as they should. Hope this helps.Thanks, Brigida
193309
O.k. Thanks! I'll try that tonight. I saw that short knob and I keep messing with it, but nothing is happening. I think I'm not doing it right though so I'll try again and maybe get someone to help me. When I jiggle and pull the knobit, do I pull on the base of the machine at the same time? Just making sure I understand what to do here. Thanks again!