I bought this pump to use on BOTH Presta and Schrader valves. How do I convert the pump from Presta to Schrader? Thanks!
443909
Unscrew the tip, and turn everything that is inside the other way, then put it back together
443910
Hi Mark, for a presta valve, you need to buy a presta attachment. You should be able to pick these up at any sporting goods store. They are cheap and screw right on and convert it to a schrader valve. Presta Adapter
496424
Yes will work on both presta and schrader valves. Does not screw on - just a press fit.
2014156
Its called presta valves, you can either get a pump that can do both presta valves and the normal valves or just get some adapters for your valves to go from presta to the normal ones. They are not hard to find I bought mine at walmart. They just screw over the presta valves.
568446
I carry a small bike pump that has both the Presta and the Schrader valves.
830404
Carl G I would like to know why you needed an oil lubricated pump? Changing to wet rotor may be an issue because of the clearances...if it stops it might only a small particle...I once had some system "goo" hat stopped one...it took washing it out with diesel to get it back running. Both engineering submitals indicate the NRF22 is about 2GPM less than the LR20BF at 10ft head...so here's the thing...depending on what system youre installing it on...most systems were designed for 160f DHW or 180f HWH water so by putting this in (I dont know your system but I would do it) you'll have a slighting lower flow rate...in DHW who cares as its no big deal...BUT in a HWH system your control valves will open more and this is a seriously good thing in modulating valves. There will be a larger delta T so I'd also lower my boiler temperature by at least 20f assuming youve some form of condensing boiler...this will help ensure youre in condensing mode. Circulate fluid...not temperature and you'll save a lot of money. Make sure your side stream filter is clean and check it a few times in the first 1-2 months because the more flow means the more crud is likely to get back to your HEX...if there isnt one put a Y strainer in and add a "sock" on the screen for a month or 2). A possible problem is how many zones open/ resistance decreases across too many different circuits/ zones...too many and there wont be enough. The system I installed this on it is actually the primary circulator through a 2xwall HEX serving the HWH off the DHW system...it works so well Ive been promoting it/ its been installed on 3 systems in this last year (its not my J.O.B but I do design energy and conservation projects as is my profession). Last, make sure the expansion tank is on the pump inlet side/ the return (DHWR or HWHR)...these high speed pumps cannot handle even a minimal bit of cavitation. All the best
2284800
There is an attachment on the tip where you can switch it between presta and schrader. All the parts should be in there! I had to mess around with both bike tires (one of each kind) to figure it out but it works!
1145289
A Schrader valve is the standard valve on inner tubes and car tires. For your bike it is a larger diameter hole on the rim. A presta valve is skinny and has a nut on it to hold the valve tight on the rim. skinny rims like for road bikes and now a lot of mtn bikes use presta valves. I like schraders so I drilled my rim with 1/4 inch bit to accommodate the tubes. Good luck.
652713
Dad2Three is right. Just one more note on this. At least on my pump, the nut on the head of the pump was impossible for me to loosen by hand since it was so tight. I could only loosen it with the careful use of a vice grip. I didn't want to break the nut, so I put wrapped a rag around it to avoid scratching or damaging the nut, and I didn't squeeze too hard on the nut. I was able to loosen it this way and then do what Dad2Three said to make it work for presta valves.
267322
Unless they have changed the design, you need a presta pump, or a combination pump (both presta and shrader in one pump.) I suggest you invest in a nice pump as we broke ours after one day of rocket launches. You may want to try a shrader pump with a presta adapter, since the cheaper combo ones can fail under pressure, at least in my experience.
1876056
Or you can take it to a good bike shop that will drill out the hole in the rim to accept schrader valve tubes. Prestas are very finicky, delicate and serve no better purpose than a traditional schrader on a mountain bike. People just think they are exotic because they are normally found on more high-end road bikes.
1777725
Hi. I use this pump to adjust the air suspension on my H-D Ultra Limited, so I am not sure how it will work in other applications. This is a great pump for the way I use it. It has a short hose and a no-leak head (the part that attaches to the Schrader valve) that keeps the air in when attaching and removing. The short hose works well for me since the Schrader valve is located in a very tight location - between the frame and the left saddlebag. Even with my big fingers, I can easily attach and remove the hose. I hope these comments help.
1758663
It's cheaper to buy some adapters than buy a new pumpTo pump up European tires you need to buy a presta-to-schrader valve adapter and screw it onto your dunlop valves. Boom, done. As arbitrarily as the bike industry has handed us theses three valve types to deal with, they have offered up a nice solution: the threads on the presta and dunlop valve are identical. A presta-to-schrader adapter is therefore a dunlop- or presta-to-schrader adapter.
221081
No, you should not drill out the hole to fit a Schrader valve. Where the hole is drilled for the valve is the weakest part of the rim, and drilling out would almost guarantee failure. The whole point of presta valves is that they are smaller diameter and can do with a smaller hole, leave more metal, and do with a narrower and lighter rim. If these were made of steel, I would say that it might be possible, but they are an aluminum alloy. I bought these and was tempted to drill them out since I didn't have presta valve inner tubes on hand, and I'm glad I didn't. I ordered thick puncture resistant presta valve inner tubes and put Continental Gatorhardshell tires on them, and I haven't had any problems at all with this combination after about 1000 miles.
1927655
You just push the presta valve in there and turn the black notched part to fasten it. You won't get any click or indication it's locked in, and it won't stop turning but it'll work. No conversion tool needed.
2260404
From the pump description provided via Amazon: "....to configure the pump head for either Presta or Schrader valve stems...." You will find specific directions on the manufacturer's Geared2U website.
263066
From what I've done with this pump, I feel that the only way to use this pump with other sized valves would be to use an external converter that could probably be purchased here or at any bike store or department store. It's possible though that there are different "versions" of this product that may come with other attachments, it's just that mine did not. Hope this helps!
1384699
You may need to "smash" the part that locks onto the Schrader valve. It is kind of a cheap made tool. Works OK if you only need one occasionally