Fits Belvedere brand standard hydraulic base
On Belvedere Hydraulic Pump there should be a serial number tag on the front of the cap that covers the workings of the pump.  The serial number should start with  "RD" or "LB" or "CB" ( like: CB12C-KV93063 )

If you can not find the tag, you are welcome to e-mail me a photo of the base at
customerservice@CacheBeauty.com  Attn: Bill

* This part may fit other name brand seat pumps but the seat manufactuer must be in the U.S.

*** Fits 4" O.D. Standard Hydraulic Pump

Fits Belvedere® brand standard hydraulic base
May fit other brand names ***  4" O.D. Standard Hydraulic Pump
This PART consists of the following parts:
* Bottom Casting part # HLP- 4001-4
* Plunger Sleeve - part # HLP-5505H
* Plunger Plug - part # HLP-5515
* Plunger O-Ring - part # HLP-5584
* Pump Plug Ball - part #HLP-5517
* Pump Plug Spring part # HLP-5516
* Pump Plug Spring Hld part # HLP-5518
* Pipe Plug part # HLP-5540
** Special Order Part **  Please allow 10 - 18 days to ship then 3 - 7 days to deliver on UPS
*** THIS ITEM IS NON-RETURNABLE ***

See schematic for this pump on web page:
http://www.cachebeauty.com/Parts/hydraulic_pump_repair_info_4inch.htm

This Bottom Casting is recognized by its (4) Stud Bolt Threaded Holes on the inside that the stud bolts (not included) theads into that holds this Top Cover Casting to the bottom casting. Also the Threaded Holt Holes on the Bottom that will hold on the Base Plate (not included)