Hi,
I was given a spa, it is in good condition (does need work, was told it stopped working in spring) On the tub itself it says Hydro-spa. But on the redwood skin the plate says model # SU1G157H9EEIZ and serial # 9805 17436 Also the plate say National Equip. corp. The controls on the tub say Platinum Series. I contacted Hydo Spa and they say that the serial # & Model # aren't theirs.
Could someone help with gettting the schematics and or a service manual for it? Who is it made by, year etc
Thanks
Jon

You have to go by the seat of your pants.

Take photos, post them. No photos=no help.

With your questions, you may as well have called up Ford asking for a schematic and owners manual on a model A. Perhaps someone was good enough to save them somewhere, perhaps not - as in your case. Nemco's been dead for many many years now.

There are no established standards in this biz.