knock off yong heng ?

Yong heng probably is just a company that redistributes compressor that are made elseware. The factory that makes them will probably sell it to whoever ask if that’s what you wank look for a dealer who has good references on US sites. 

I observed the same thing with my supplier's add. When it arrived it had all the usual branding on it.

Same here yet when mine was delivered it did have Yong Heng on it. I offered $250 delivered and they accepted the offer btw. 

I paid $282 for my pump and it was unmarked/no-name on the website like your link but when I received it it said Yong Heng on the side.

Ordered from the seller listed above and the compressor i received is a bit different . The hard line configuration and head are different , push type waterline conections , and the low and high pressure blocks are not beveled and have a different finish . Any thoughts on this head configuration ?

{I was looking for a deal on a yong heng compressor on ebay, and stumbled onto what looks like an identical compressor minus the “yong heng” writing on the side. Does anyone have any info on these. Here is a link to the compressor in question, and its priced at 282$ so its about 50$ cheaper than any of the compressors with the Yong Heng writing on the side. 
https://www.ebay.com/itm/172856432789?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649}

​Looks good to me, that's the version that you want with the cyclone separator between the first and second stages... This looks like a good one since it ships from CA and not China or Hong Kong.
​Mike

Most of the inexpensive items we buy from China are made by a manufacturer that will put any lable the customer wants. There can be slight differences in them based on what the buyer contract for in their order. hopefully you find a seller that is looking to sell a good product and now one looking to maximize their profit. Personally i would only buy from a seller with at least a 2 year history of satisfaction with their customers. If you are unable to do the future required maintenance and rebuilding these compressors require get something else and if you cant stick with springers.

This is encouraging lol , a free screw in the cranckcase and some rust in the head . Fresh out of the box .
.

Just couldn't help myself lol

Groundhog, can’t make heads or tails of that last photo. What is it?

Oh sorry , its the low pressure block chucked up in the lathe after getting heatsink cut into it . Figured I would do something with all the unused material left on it , may not make any difference but it won't hurt eigther . Not the prettiest job in the world , eyeballed everything except the depth of cut .

Ahhhh, I see. Cool. I just glued a few 40mmx40mm computer heat sinks to the outside, but this should be effective. Thanks. Not sure I would do that with the high pressure block. 4500 psi and all. Your low pressure block only sees less than 200 psi.

No I'm not going to touch the stock high pressure block , unknown material and all . Actually planning to get some 7075 and machine a new one from scratch with the proper 4:1 safety margine , also going to do a new hp head as well latter on since the water cooling only really cools the high pressure cylinder and the low pressure head .

I purchased one just like the link you posted for the same price and it also shipped from CA, but from a different ebay seller. The listing did not show the a name on it but the unit does have yong heng written on it. I've had it for a couple of months now and am beyond pleased with it. Not a single issue so far and I am amazed how fast it is for its size. The only mod I did was add in a radiator with a cooling fan between the compressor and the coolant tank reservoir. 

I ordered what I thought was a YH from California on ebay but turned out to be a knockoff. I was concerned at first but the thing seemed solid so I hooked it up. First time I turned it on it sputtered and groaned and I thought I was screwed but it turned out that I had it plugged into a circuit that had my window A/C running on it too. When I plugged it into another circuit, it ran like a champ. The thing does pull 20 amp (110v) so make sure your circuit can handle it. I thought I read in one of the threads that the YH pulled less than 10 amps but I could be mistaken. I have it in my small back yard wood working shop and I just finished my set up today. Here is what I came up with.


Right now I am directly filling my Mrod and since I am mostly target shooting in the back yard, it isn't too inconvenient. However, I just received a used SCBA bottle that's in very good shape but expired this month, which I don't care about, because I can fill it myself and I am convinced those things will last forever despite the arbitrary "lifetime" they put on them. Now just waiting on the fill probe to come from China.
I would like to thank everyone on this forum for all the great information on these compressors and filters, etc.! Sure beats the heck out of getting a few fills off the top of my SCUBA tanks!

scuba and high pressure carbon fiber tanks are not the same. If its just a standard aluminum or steel tank max recommended psi is around 3200 most dive shops here in Florida fill between 2800 and 3200psi

I have a similar set up when i fill a large cf tank (106cu/ft) it takes about 30mins and i put a small (7)lb bag of ice and it keeps it cool

I guess I didn't explain it clearly. I was using 3000psi SCUBA tanks (steel diving tanks) but I am switching to a 4500 PSI carbon fiber SCBA tank that I will fill with my YH. I can get a few fills off the top of my 3000 psi tanks but not that many before I have to lug them into the dive shop. They always seem to need a VIP, can't get the fill on the same day, etc., thus the YH compressor. These things have really changed the PCP game. The name brand compressors are just too much $$.

I too recently ordered no brand compressor from ebay. After best offer price was accepted ($250) and discount coupon applied I ended up paying $212 shipped.


It arrived delivered by FedEx 3 days after the purchase from warehouse in NJ.

After trip to Pep Boys to get #46 hydrolic oil ($14 for a gallon) I was in business.
So far I fill rifle directly, it takes only few seconds of running it to do it.
I've ordered SCBA tank from ebay that just expired but has recent hydro and SCBA fill whip. Plan to fill the tank myself.