Pentair 350033Z EQ750 plastic diffuser assembly for EQ Series commercial pumpsPentair EQ750 Diffuser Assembly, 7.5HP, 350033Z In stock$68699
Pentair 350033Z EQ750 plastic diffuser assembly for EQ Series commercial pumps
Shop all Pentair

Pentair EQ750 Diffuser Assembly, 7.5HP, 350033Z

Ask a questionMPN 350033Z
$68699
FREE Delivery
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

  • Genuine Pentair Factory part number 350033Z for the EQ Series commercial pumps.
  • Plastic diffuser assembly The molded diffuser that directs flow off the impeller into the volute.
  • EQ Series commercial Built for Pentair EQ Series commercial pool and spa pumps in the 7.5 and 10 HP range.
  • Broad model coverage Listed for EQ750, EQK 500 - 750, EQKT 750 - 1000, EQ1000, EQK 750 - 1000 and WQ1001.
  • Restores lost head A cracked or worn diffuser bleeds pressure and shows up as reduced flow across the system.
  • Service it with the seals The diffuser o-ring and the seal plate o-ring are separate parts worth changing at the same time.
Full description and specifications ↓

Need a hand?

Bilingual support from pool professionals.
(888) 751-8084CallChat with a techChatEmail usEmail

Send us a message

A pool professional will get back to you, usually the same business day.

About Pentair EQ750 Diffuser Assembly, 7.5HP, 350033Z, SKU PAC-101-6504. We will include it with your message.

We use your details to answer this message and nothing else.

Frequently bought together

Current item Pentair EQ750 Diffuser Assembly, 7.5HP, 350033Z
Pentair

EQ750 Diffuser Assembly, 7.5HP, 350033Z

$68699
Pentair Genuine OEM Seal Kit for WhisperFlo and IntelliFlo Pool Pumps, 356198
Pentair

Genuine OEM Seal Kit for WhisperFlo and IntelliFlo Pool Pumps, 356198

$3799
Pentair OptiFlo Strainer Pot with Drain Plug, 357228Z
Pentair

OptiFlo Strainer Pot with Drain Plug, 357228Z

$4099
Pentair WhisperFlo and IntelliFlo Volute Housing Replacement Kit, 357149
Pentair

WhisperFlo and IntelliFlo Volute Housing Replacement Kit, 357149

$28799
Pentair 3.2 kW IntelliFloXF VSF, VSF, VS+SVRS, i1, i2 Motor, 350305S
Pentair

3.2 kW IntelliFloXF VSF, VSF, VS+SVRS, i1, i2 Motor, 350305S

$78199
Pentair Lid O-Ring, 5-3/4" ID, 350013Z
Pentair

Lid O-Ring, 5-3/4" ID, 350013Z

$599
Pentair Genuine OEM O-Ring, Square 8.5 in. Closure, 152509
Pentair

Genuine OEM O-Ring, Square 8.5 in. Closure, 152509

$1399
Subtotal

Similar products

Other products people compare with this one.

Pentair Diffuser Assembly for EQ Series EQW300 EQ1500 | 356735 Pentair Diffuser Assembly for EQ Series EQW300 EQ1500 | 356735$51099 Pentair 353010 SuperFlo volute housing assembly kit, almond Pentair SuperFlo Volute Housing Assembly Kit, 353010$37899 Pentair 350027Z EQ Series impeller assembly for EQ1500 and EQW300 pumps Pentair EQ Series Impeller Assembly, 350027Z$50499 Pentair 350030Z EQ500 pump impeller assembly Pentair EQ500 Pump Impeller Assembly, 350030Z$39599 Pentair 350028Z EQ1000 pump impeller assembly Pentair EQ1000 Pump Impeller Assembly, 350028Z$45799 Pentair DIFFUSER EQ500 | 350032 Pentair DIFFUSER EQ500 | 350032$73699 Pentair Basket Strainer 5HP Challenger Stainless Steel | 355901 Pentair Basket Strainer 5HP Challenger Stainless Steel | 355901$35599 Pentair 357391 pot assembly with stainless steel basket, black Pentair Pot Assembly with Stainless Steel Basket, Black, 357391$41829 Pentair 353127 drive with cover kit for the SuperFlo VS variable speed pump Pentair Drive with Cover Kit for SuperFlo VS Pump, 353127$74199 Pentair 356880Z IntelliFlo VSF drive kit in almond, before October 2020 Pentair IntelliFlo VSF Drive Kit, Before 10/2020, Almond, 356880Z$99299
Pentair 356750Z EQ Series clear strainer lid Pentair EQ Series Strainer Lid, Clear, 356750Z$43799 Pentair 356163Z drive and drive hardware kit for the 3 HP IntelliFlo3 pool pump Pentair Drive and Drive Hardware Kit for 3HP IntelliFlo3 Pool Pump, 356163Z$1,06399 Pentair 356795Z EQ Series seal plate, 11 by 2.5 inches Pentair EQ Series Seal Plate, 11" x 2.5", 356795Z$92899 Pentair C5-249 high head impeller, 5 HP, for D Series pumps Pentair High Head Impeller, 5 HP, for D Series Pumps, C5-249$60099 Pentair 350171 lock ring with lid gasket for EQ Series pumps Pentair Lock Ring/Lid Gasket for EQ Series Pumps, 350171$62599 Purex Pentair 70906 brass seal flange for C Series commercial pool pumps Pentair Purex Brass Seal Flange Machine C-52, 70906$57599 Pentair S01200 B11" Stainless Steel Basket C-29 | 072795 Pentair S01200 B11" Stainless Steel Basket C-29 | 072795$40099 Jandy R0445601 pump body for Stealth SHPF/SHPM, WaterFall SWF and ePump JEP, rear view Jandy Pump Body for Stealth SHPF/SHPM Pumps, R0445601$38199 Hayward SPX3200A TriStar pump strainer housing, 2 in. x 2 in. threaded, with drain plugs Hayward TriStar Pump Strainer Housing 2" x 2" with Drain Plugs, Threaded, SPX3200A$35199 Jandy R0448700 pump body housing for PlusHP PHPF and PHPM pool pumps Jandy Pump Body PHPF/PHPM, R0448700$35699

Product details

The Pentair 350033Z is the plastic diffuser assembly for the EQ Series commercial pool and spa pumps. It is the genuine Pentair part, listed as the 7.5HP diffuser assembly for the EQ750.

What the diffuser does

Water leaves the impeller fast and turbulent. The diffuser is the molded piece that catches that flow and converts speed into pressure before it reaches the volute. It is doing real work every hour the pump runs, and when it cracks, distorts or wears its clearances open, the pump keeps drawing the same power while delivering noticeably less head. On a commercial system that shows up as poor turnover long before anything sounds wrong.

Fit

Pentair lists this diffuser for use with the EQ-Series Commercial Pool and Spa 7.5 and 10 HP pump models EQ750, EQK 500 - 750, EQKT 750 - 1000, EQ1000, EQK 750 - 1000 and WQ1001. Check your pump against that list rather than the horsepower alone.

The diffuser o-ring and the seal plate o-ring are separate parts. Since the pump has to come apart either way, most techs renew both along with the diffuser.

From Pool School

How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read
Specifications
Brand Pentair
Manufacturer part number 350033Z
UPC 788379689681
Type Diffuser assembly
Material Plastic
Horsepower 7.5HP
Series EQ Series commercial
For use with EQ-Series Commercial Pool and Spa 7.5 and 10 HP Pump Models EQ750, EQK 500 - 750, EQKT 750 - 1000, EQ1000, EQK 750 - 1000 and WQ1001
Part type Pool Pump Part
Shipping weight 2 lb
Ships Parcel

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

From Pentair

Your trusted source for all things pool. Pentair

Pentair equipment

Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, 2.2 THP, EC-342001 Pentair MasterTemp 400 Natural Gas Pool Heater, EC-462028 Pentair Clean & Clear Plus 420 sq ft Cartridge Pool Filter, EC-160301 Pentair IntelliConnect Control & Monitoring System with Wi-Fi, EC-523317
Shop Pentair equipment

Genuine Pentair parts

Pentair Genuine OEM Seal Kit for WhisperFlo and IntelliFlo Pool Pumps, 356198 Pentair Genuine OEM High Flow Manual Air Relief Valve, 98209800 Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400 Pentair Genuine OEM MasterTemp/Max-E-Therm 6-Button Control Board Kit, 461105Z
Shop Pentair parts
Pool lighting: a backyard pool and spa lit in blue and green at nightPool water treatment: three people floating on rings in clear blue water, seen from abovePool cleaners: a toddler in flower sunglasses laughing in a yellow ring, held by her mother
Pentair makes pumps, filters, heaters, salt chlorinators, cleaners, lighting and automation for pools and spas.Shop all Pentair

Customer reviews

More from Pentair

Pentair SuperFlo VS EC-342001 1.5 HP variable speed pool pump, front view Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, 2.2 THP, EC-342001$1,48900 Pentair SuperFlo EC-348190 single speed pool pump, 1 HP, 115/230V Pentair SuperFlo 1 HP Single Speed Pool Pump, 1.1 THP, 115/208-230V, EC-3481905.0 (1) $74800 Pentair WhisperFlo VS EC-011533 2.6 THP variable speed pool pump, top view Pentair WhisperFlo VS / VST 2.6 THP Variable Speed Pool Pump, 115/208-230V, EC-011533$1,79900 Pentair 262506 HiFlow 1.5 in. six way clamp style multiport valve Pentair Genuine OEM HiFlow Valve 1.5 in. 6-Way Clamp Style, 262506$20399 Pentair EC-520556 IntelliChlor 110/220V power center Pentair 110/220V IntelliChlor Salt Chlorine Generator Power Center, EC-520556$79900 Web Price Pentair 523769 IntelliChlor Plus and LT replacement sensor board Pentair IntelliChlor Plus and LT Replacement Sensor Board, 523769$39399 Pentair 350305S 3.2 kW 10 pole variable speed motor for IntelliFloXF and IntelliFlo 2 VST pumps Pentair 3.2 kW IntelliFloXF VSF, VSF, VS+SVRS, i1, i2 Motor, 350305S$78199 Pentair 523735-EC IntelliChlor Plus40 salt chlorine generator cell Pentair IntelliChlor Plus40 Salt Chlorine Generator Replacement Cell, 40,000 Gallons, 523735-EC$1,81900 Web Price Pentair Rainbow 320 in-line chlorinator R171096, front view Pentair Rainbow 320 In-Line Chlorinator, R171096$14699 Pentair 190003 tank clamp kit with tension control for Clean and Clear Plus, FNS Plus and Quad DE filters Pentair Genuine OEM Clamp Kit with Tension Control, 190003$30199
Pentair IntelliChlor LT25 salt chlorine generator cell 523747-EC Pentair IntelliChlor LT25 Salt Chlorine Generator Cell, 25,000 Gallons, 523747-EC$1,14900 Pentair IntelliFlo VS+SVRS variable speed pool pump, EC-011057 Pentair IntelliFlo VS+SVRS Variable Speed Pool Pump, 3 HP Max, 3.95 THP, 230V, EC-011057$2,39900 Pentair 170145 cartridge pack for Sta-Rite System 3 S7M120, inner and outer cartridges Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S$48299 Pentair 261055 SM-20-3 2 in. side mount multiport valve kit, front view Pentair 2 in. Multiport Valve Kit for Side Mount Sand Filters, SM-20-3, 261055$29999 Pentair 523770 IntelliChlor Plus replacement controller (HMI), black Pentair IntelliChlor Plus Controller Replacement (HMI), Black, 5237705.0 (1) $38399 Pentair 261152 SM20-2 2 in. side mount multiport valve kit for DE filters Pentair 2" Valve Kit Multiport, Side Mount DE Filters SM20-2, 261152$29799 Pentair 357149 WhisperFlo and IntelliFlo volute housing replacement kit, front view Pentair WhisperFlo and IntelliFlo Volute Housing Replacement Kit, 357149$28799 Pentair MicroBrite Color LED pool light EC-620425, 12 volt, 14 watt, with 100 ft cord Pentair MicroBrite Color LED Pool Light 12 Volt, 14 Watt with 100' Cord, EC-620425$61900 Pentair 59023400 FNS Plus 48 sq ft complete DE grid assembly Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400$40199 Pentair Amerlite EC-602128 500W 120V inground pool light with stainless steel facering Pentair Amerlite Pool Light for Inground Pools with Stainless Steel Facering, 500W 120V 50' Cord, EC-602128$43900 Web Price

Questions and answers

What people ask about this product, answered by our pool techs.

Which pumps does this diffuser fit?
It is listed for the EQ-Series Commercial Pool and Spa 7.5 and 10 HP pump models EQ750, EQK 500 - 750, EQKT 750 - 1000, EQ1000, EQK 750 - 1000 and WQ1001.
The listing says 7.5HP but the fit list includes 10 HP models. Which is right?
Pentair describes 350033Z as the 7.5HP diffuser assembly and also lists it against the 7.5 and 10 HP EQ Series models shown above. Match your pump against that model list before ordering.
Is the o-ring included?
No. The EQ Series diffuser o-ring is a separate Pentair part, as is the seal plate o-ring. Replace them while the pump is apart.
What happens when a diffuser wears out?
The diffuser shapes the water leaving the impeller. When it cracks or the clearances open up, the pump loses pressure and the whole system moves less water for the same power.
Ask your own question