
Compatible with Baker Hydro
31B9034
Key Washer for 30-Inch and 36-Inch HRV Filters, Compatible with Baker Hydro
Our part number
If the number stamped on your failed part differs, send it over — we will confirm the match against our fitment records.
OEM numbers listed for fitment identification only.
Specifications
| Compatible brand | Baker Hydro |
|---|---|
| Category | Filters & Filter Parts |
| Lead time | 15–25 days after order confirmation |
- MOQ 50 pcs · samples from 1
- Private label available
- Ships from our factory
Request wholesale quote
One request covers the whole list — no need to send them one by one.
Tiered pricing available above 1,000 pcs · OEM packaging available
Product overview
Key Washer for 30-Inch and 36-Inch HRV Filters, Compatible with Baker Hydro — an aftermarket valve handle / key dimensioned to drop into Baker Hydro filtration systems without modification. In service it gives the operator positive control of the valve position and holds it there. It is a wear item: the splines and detents round off from repeated force, so the handle turns without moving the valve.
Fits these systems
HRV
Equipment models (not part numbers):
Not sure it fits? Send us a photo of your part and we'll confirm. Send a photo
Often sourced together

Fits Baker Hydro
Control Plate Gasket, 8-5/16-Inch ID, Replacement for Baker Hydro
Fits Baker Hydro
Hub Lateral Assembly for 25-Inch and 31-Inch Tanks, Compatible with Baker HydroMore in this category
View allSourcing questions
What equipment does 31B9034 fit?
It fits HRV. Those are equipment models, not part numbers — order against 31B9034 itself.
Is 31B9034 a genuine Baker Hydro part?
No. POOLPOINT manufactures compatible aftermarket replacement parts. We are not affiliated with, sponsored by or endorsed by Baker Hydro; the brand name and OEM numbers are used to identify fitment only.
What is the minimum order quantity for 31B9034?
MOQ is 50 pcs per part, and mixed cartons are welcome to reach the order minimum. Samples are a separate case — we supply single pieces so you can confirm fitment before committing to a production run.
31B9034
Key Washer for 30-Inch and 36-Inch HRV Filters, Compatible with Baker Hydro






