Product Information
Description
- Genuine Pentair Part
- EQ Series Key No. 17
- Free Shipping
Pentair EQ Series Diffuser for EQ750 and EQ1000 Commercial Pumps (350033Z)
Genuine diffuser for 7.5 and 10 HP EQ pumps.
Pentair diffuser 350033Z is key No. 17 in the EQ Series High Performance Commercial Pump parts list, the diffuser Pentair specifies for the EQ750 and EQ1000 in single and three phase, plus several EQK750, EQK1000 and EQKT versions. It fits over the impeller and bolts to the seal plate with four screws, and its brass bushing is greased and centered on the impeller nose during assembly.
Why PST Customers Pick This
Matched to EQ750 and EQ1000
Pentair's EQ Series parts table lists 350033Z as the diffuser for the 7.5 HP EQ750 and EQK750 and the 10 HP EQ1000 and EQK1000, including the EQKT750, EQKT1000, the 575V EQK750 and EQK1000, and the explosion-proof EQK750.
Brass Bushing Inside
Pentair's assembly steps call for a light film of silicone grease on the inside of the diffuser's brass bushing. It helps center the bushing on the impeller and cuts friction if the parts touch at motor start-up. Pentair says to use no other type of lubricant.
Adjustable Fit at the Impeller
The diffuser has clearance around its four mounting screws so its fit around the impeller nose can be adjusted. Pentair says to start the screws hand tight, turn the impeller by hand, tighten each screw slowly, then confirm the impeller still turns freely.
Sealed by Its Own O-Ring
Pentair seals the diffuser with O-ring 350037Z (3/16 in. x 4-7/8 in.), listed as a separate part. Lubricate it with silicone lubricant before the motor end goes back into the housing so it slips into place without pinching.
Pairs With the Right Impeller
On the EQ750 and EQK750, Pentair pairs this diffuser with impeller 350029Z. On the EQ1000 and EQK1000, the impeller is 350028Z.
Built for the All-Plastic EQ
Pentair describes the EQ Series as a non-corrosive, all-plastic commercial pump for commercial pools and other water applications, with a closed PPO resin impeller.
Service Notice
Pentair says the EQ Series pump should be installed and serviced only by a qualified pool service professional. Disconnect power at the circuit breaker and lock out or tag the circuit before you open the pump. Pentair warns that a bound impeller may keep the motor from starting or make it draw excessive amps.
Specifications
| Identification | |
|---|---|
| Manufacturer | Pentair |
| Part Number | 350033Z |
| Pentair Description | Diffuser (Key No. 17) |
| Pump Line | EQ Series High Performance Commercial Pump |
| SKU | PST-350033Z |
| Fits These EQ Pumps | |
| EQ750, 7.5 HP, 1 Phase | 340021, 340032 |
| EQK750, 7.5 HP, 3 Phase | 340022, 340033 |
| EQ1000, 10 HP, 1 Phase | 340237, 340238 |
| EQK1000, 10 HP, 3 Phase | 340023, 340034 |
| EQKT750 / EQKT1000 | 340609, 340605 / 340610, 340606 |
| EQK750 575V / EQK1000 575V | 340149, 340156 / 340150, 340157 |
| EQK750 Explosion Proof | 340046, 340048 |
| EQK750 and EQK500, 50 Hz | 340080, 340084 / 340081, 340085 |
| EQKT750 / EQKT1000 Export | 348087, 348095 / 348088, 348096 |
| Related Parts, Separate Part Numbers | |
| Impeller, EQ750 / EQK750 | 350029Z |
| Impeller, EQ1000 / EQK1000 | 350028Z |
| Diffuser O-Ring (Key No. 21) | 350037Z, 3/16 in. x 4-7/8 in. |
| Diffuser Screw (Key No. 20) | 350035Z, 1/4 in.-20 x 1-1/2 in., qty 4 |
| Diffuser Screw Washers (Keys 18, 19) | 51008500Z flat, 072172Z split lock, qty 4 each |
| Seal Plate (Key No. 13) | 356795Z |
Frequently Asked Questions
Which EQ pumps use this diffuser?
Pentair lists 350033Z for the EQ750 and EQK750 (7.5 HP) and the EQ1000 and EQK1000 (10 HP), plus the EQKT750, EQKT1000, the 575V EQK750 and EQK1000, the explosion-proof EQK750, and the export EQKT750 and EQKT1000. Match your pump's part number to the list above.
Does it fit an EQ500 or EQ1500?
Not the standard models. Pentair lists diffuser 350032Z for most EQ500, EQK500 and EQKT500 pumps (some EQ500 and EQK500 models use 357273Z) and 356735Z for the EQK1500 and EQKT1500. The exception is the 50 Hz EQK500, models 340081 and 340085, which Pentair lists with 350033Z.
Are the diffuser O-ring and screws part of this number?
Pentair lists the diffuser O-ring (350037Z) and the four diffuser screws (350035Z) as their own part numbers, separate from the diffuser.
How does Pentair say to install it?
Grease the inside of the brass bushing with silicone grease only, fit the diffuser over the impeller and start the four screws hand tight. Turn the impeller by hand while you slowly tighten each screw, and confirm it still turns freely once they are tight. Lubricate the diffuser O-ring with silicone lubricant before sliding the motor end assembly back into the housing.
Order the 350033Z From PST
Backed by PST Pool Supplies' service team.
- Free Shipping
- 30-Day Returns
- Genuine Pentair Part
- Authorized Pentair Dealer
Additional Info
| Category | Parts Pool Parts Pool Pump Parts |
| SKU | PST-350033Z |
| MPN | 350033Z |
| Manufacturer | Pentair |
| Weight | 0.1 lb |
Let customers speak for us
The process was smooth and lights arived as expected. Everything test out in good working order.
Needed to replace the control overlay on our Nordic Impulse hot tub, but could not find out the make or model number of the actual control panel on our tub. By taking measurements and photos or our actual control panel button positions and functions, I was able to narrow down the options. I ordered this overlay as the button positions seemed to be in the right positions, even though the overall size was smaller than the control panel. The overlay works, in that all buttons and functions are in the right place, and the overlay seems to have adhered well to the panel. It is not a perfect match, as it is smaller overall than it should be. But I am happy with the result and will buy an additional identical overlay as a backup in case this one, too, deteriorates at some point. Took a lot of detecting, but the result is successful!
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Excellent service!
PST was great at communicating the status of my order throughout the various stages. I actually did encounter a shipment issue and they handled it without issue. I will be doing business again with them.
PST was great at communicating the status of my order throughout the various stages. I actually did encounter a shipment issue and they handled it without issue. I will be doing business again with them.
as described, fast shipping
My wife has RA and is always uncomfortable. Our hot tub heater failed and all the local shops were not able to assist until November. I was able to order an exact replacement part which was delivered within 3 days the hot tub was up and functioning in three days. I was very impressed with the quality and service.
Good quality just ordered wrong size and also need thicker cover
Fit perfectly, and fast shipping
Super fast shipping and reliable product !
I accidentally broke the original knob by tightening it too much. This was a perfect fit and works 100%. Fast delivery too!
Swapped out broken heater (lasted about 6 years) for this one. The instructions are for the electronics, not for the plumbing. You must get everything perfectly aligned or the plumbing may leak. I needed to loosen the electronics box to get the plumbing perfectly aligned. I have hot water again.
Great prices, fast shipping, great products
Haven't received yet but I'm sure it'll be great
