Pentair 51020900 two piece plastic multiport valve clamp assemblyPentair Clamp Assembly, Multiport Valve, 51020900 In stock$4999
Pentair 51020900 two piece plastic multiport valve clamp assembly
Shop all Pentair

Pentair Clamp Assembly, Multiport Valve, 51020900

Ask a questionMPN 51020900
$4999
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

  • Holds the valve to the tank This is the clamp that keeps a top mount multiport valve seated on the filter body.
  • Two piece plastic Comes as a two piece clamp that closes around the joint and pulls up on its bolts.
  • 18, 20 and 22 inch bodies Listed for those top mount filter body sizes.
  • Measured for you Outside diameter is 7-3/4 inches at the center of the clamp away from the bolts and 8-3/8 inches at the bolt lugs, and the clamp is 15/16 inch top to bottom.
  • Cracked clamps leak A split clamp lets the valve lift under pressure, which shows up as weeping or a blown seal at the top of the tank.
  • Pentair part 51020900 The factory number for this clamp assembly.
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 Clamp Assembly, Multiport Valve, 51020900, SKU AMP-051-1136. We will include it with your message.

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

Frequently bought together

Current item Pentair Clamp Assembly, Multiport Valve, 51020900
Pentair

Clamp Assembly, Multiport Valve, 51020900

$4999
Pentair Genuine OEM HiFlow Valve 1.5 in. 6-Way Clamp Style, 262506
Pentair

Genuine OEM HiFlow Valve 1.5 in. 6-Way Clamp Style, 262506

$20399
Pentair Genuine OEM High Flow Manual Air Relief Valve, 98209800
Pentair

Genuine OEM High Flow Manual Air Relief Valve, 98209800

$3599
Pentair Genuine OEM Clamp Kit with Tension Control, 190003
Pentair

Genuine OEM Clamp Kit with Tension Control, 190003

$30199
Pentair 2" Valve Kit Multiport, Side Mount DE Filters SM20-2, 261152
Pentair

2" Valve Kit Multiport, Side Mount DE Filters SM20-2, 261152

$29799
Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S
Pentair

Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S

$46499
Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400
Pentair

Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400

$40199
Subtotal

Similar products

Other products people compare with this one.

Pentair Multiport Side Mount Valve Handle 1.5 and 2 inch | 14971-SM10E1 Pentair Multiport Side Mount Valve Handle 1.5 and 2 inch | 14971-SM10E1$4899 Jandy R0745100 filter clamp assembly and hardware for SFTM top mount sand filters Jandy Filter Clamp Assembly and Hardware, R0745100$7199 Hayward GMX600NM two piece Vari-Flo valve clamp for Pro Series sand filters Hayward Valve Clamp for Pro-Series, GMX600NM$6099 Pentair 155710Z pump to filter connection assembly for SD40 Sand Dollar filters Pentair Pump Connection Assembly SD40, 155710Z$7099 Pentair 154540 12 in. lateral assembly for Triton II TR140 sand filter Pentair Genuine OEM Lateral Assembly TR140, 154540$2899 Pentair 155711 pump connection assembly for the Sand Dollar SD60 filter Pentair Pump Connection Assembly SD60, 155711$7199 Pentair 154763 hub assembly for Triton II TR40, TR50 and TR60 sand filters Pentair Genuine OEM Hub Assembly TR40/TR50/TR60, 154763$3899 Pentair 155299 Tagelus TA60 piping assembly with hub and 1/4 turn lateral Pentair Genuine OEM Piping Assembly with Hub TA60D, 155299$4999 Hayward GMX600N metal flange valve clamp for GM1426 and S140T filters Hayward Flange Valve Clamp, GM1426/S140T, GMX600N$5699 Pentair 24700-0075Z 4.5 inch sand filter lateral assembly Pentair 4.5" Long Lateral Assembly for HRPB24 and HRPB30, 24700-0075Z$3099
Pentair 155753 genuine OEM hub adapter assembly for Triton II sand filters Pentair Genuine OEM Hub Adapter Assembly, 155753$4699 Pentair 154599 diffuser assembly for the Triton TR60 sand filter Pentair Genuine OEM Diffuser Assembly TR60, 154599$5999 Pentair 155062 genuine OEM piping assembly with hub for Sand Dollar SD40 and Tagelus TA50 Pentair Genuine OEM Piping Assembly with Hub, SD40, TA50, TA50D, 155062$4899 Pentair 154805 lower piping assembly for the side mount Triton TR60 sand filter Pentair Genuine OEM Lower Piping Assembly TR60, 154805$6099 Pentair Air Bleed Tube Assembly 320 Sq Ft | 170029 Pentair Air Bleed Tube Assembly 320 Sq Ft | 170029$5199 Pentair Rotor Spider Gasket Assembly | 50131400 Pentair Rotor Spider Gasket Assembly | 50131400$4299 Pentair 155151 flexible hose kit, 1.5 in. x 6 ft, for Sand Dollar filter systems Pentair Sand Filter Hose Kit 1.5 in. x 6 ft, 155151$5899 Jandy R0745800 valve tank o-ring for SFTM sand filters Jandy Valve Tank O-Ring, R0745800$3299 Pentair 154712 sand filter drain cap Pentair Genuine OEM Sand Filter Drain Cap, 154712$3699 Pentair 152220Z 2 inch NPT left-hand threaded spigot sand filter drain Pentair Genuine OEM 2" NPT Left-Hand Threaded Spigot Sand Filter Drain, 152220Z$4699

Product details

The Pentair 51020900 is the two piece plastic clamp assembly that holds a top mount multiport valve to the filter body.

What it does

On a top mount filter, the multiport valve sits on the tank neck and is held down by a split clamp. The two halves wrap the joint and pull together on their bolts, and that clamping force is the only thing resisting system pressure trying to lift the valve off the tank. It is listed for 18 inch, 20 inch and 22 inch filter bodies.

Check the measurements

Filter clamps come in a lot of near identical sizes, so measure before you order. This clamp has an outside diameter of 7-3/4 inches at the center of the clamp away from the bolts, 8-3/8 inches across at the part where the bolts go, and stands 15/16 inch top to bottom.

When to replace

Plastic goes brittle with years of sun, and bolt lugs crack when a clamp has been overtightened. A cracked clamp will still look assembled while letting the valve lift slightly under pressure, which shows up as a weep at the top of the tank or, at worst, a valve that separates. Replace it rather than trying to hold a split clamp together with more torque.

Specifications
Brand Pentair
Manufacturer part number 51020900
UPC 788379677008
Type Multiport valve clamp assembly
Part type Pool filter part
Construction Two piece plastic clamp
Fits 18", 20" and 22" top mount filter bodies
Outside diameter, center of clamp away from bolts 7-3/4"
Outside diameter, at bolt lugs 8-3/8"
Clamp height 15/16" top to bottom
Shipping weight 0.4 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, 5237695.0 (1) $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$46499 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.

What does this clamp do?
It holds the top mount multiport valve onto the filter body. The two halves close around the joint and the bolts draw them together.
Which filter sizes does it fit?
It is listed for 18 inch, 20 inch and 22 inch top mount filter bodies.
How do I check it against mine?
Measure your clamp: this one is 7-3/4 inches across at the center away from the bolts, 8-3/8 inches across at the bolt lugs, and 15/16 inch tall.
Why do these fail?
Plastic clamps get brittle from sun and repeated overtightening, then crack at a bolt lug. Once cracked, the valve can lift under pressure and the joint weeps or blows out.
Ask your own question