Hayward SP1056 1-1/2 inch hydrostatic relief valveHayward 1-1/2" Hydrostatic Relief Valve, SP1056 In stock$3099
Hayward SP1056 1-1/2 inch hydrostatic relief valve
Shop all Hayward

Hayward 1-1/2" Hydrostatic Relief Valve, SP1056

Ask a questionMPN SP1056
$3099
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

  • Genuine Hayward The factory SP1056 hydrostatic relief valve, not an aftermarket copy.
  • 1-1/2 inch Supplied in the 1-1/2 inch size.
  • Protects an empty shell Ground water pressure under a drained pool has to go somewhere, and this valve gives it a path into the pool instead of against the floor.
  • Sits in the drain sump A hydrostatic valve installs at the main drain so it works at the lowest point of the pool.
  • Passive There is nothing to power or set. It opens on differential pressure and closes again on its own.
  • Cheap insurance Replacing a seized or missing valve costs far less than the shell damage it prevents.
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 Hayward 1-1/2" Hydrostatic Relief Valve, SP1056, SKU HAY-25-1518. We will include it with your message.

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

Frequently bought together

Current item Hayward 1-1/2" Hydrostatic Relief Valve, SP1056
Hayward

1-1/2" Hydrostatic Relief Valve, SP1056

$3099
Hayward Cover O-Ring for SP0714T Vari-Flo XL Valve, SPX0714L
Hayward

Cover O-Ring for SP0714T Vari-Flo XL Valve, SPX0714L

$1799
Hayward Paralevel Startup Kit, 004-760-2921-00
Hayward

Paralevel Startup Kit, 004-760-2921-00

$5799
Hayward 1-1/2" Combo Hose Adapter for Filters, Pumps, Skimmers and Chlorine Feeders (2 Pack), SPX1091Z7
Hayward

1-1/2" Combo Hose Adapter for Filters, Pumps, Skimmers and Chlorine Feeders (2 Pack), SPX1091Z7

$899
Hayward Genuine OEM SP1082 Skimmer Basket, SPX1082CA
Hayward

Genuine OEM SP1082 Skimmer Basket, SPX1082CA

$2399
Paramount 6 Port Water Valve Module, 004-302-4408-00
Paramount

6 Port Water Valve Module, 004-302-4408-00

$34999
Hayward Auto-Skim Skimmer for Vinyl/Fiberglass Pools, 1.5" FPT, Square Lid, White, SP10841
Hayward

Auto-Skim Skimmer for Vinyl/Fiberglass Pools, 1.5" FPT, Square Lid, White, SP10841

$19299
Subtotal

Similar products

Other products people compare with this one.

Hayward SPX1091Z9 threaded extension coupling, 1-1/2 in. MIP x FIP, white Hayward Threaded Extension Coupling, 1-1/2 in. MIP x 1-1/2 in. FIP, White, SPX1091Z9$1699 Sta-Rite 08428-0125 SwimQuip white inlet face plate and eyeball kit with screws Sta-Rite Face Plate Inlet Eyeball Kit with Screws, 08428-0125$3499 Hayward SP1480BLK 1-1/2 inch male thread union in black Hayward 1-1/2" Union Male Thread, Black, SP1480BLK$2699 SP1107 pool plumbing and piping tag labels, one sheet Pool I.D. Pool Plumbing and Piping Tag Labels, SP1107$1799 Waterway 400-4030 1-1/2 inch union, male pipe thread by female slip Waterway 1-1/2" x 1-1/2" S Union MPT, 400-4030$1599 Super-Pro 25215-001-000 gray fiberglass Hi-Flo suction fitting with 6 in. cover, wall fitting and nut SuperPro Gray Fiberglass Hi-Flo Suction Fitting Complete with 6" Cover, Wall Fitting and Nut, 25215-001-000$3599 Polaris Caretaker 4-1-2002 complete 2 inch union Polaris Caretaker Genuine OEM 2" Union Complete, 4-1-2002$3899 Perma-Cast PB-2008 bronze PoolBond water bonding fitting Perma-Cast 1" MPT Bronze PoolBond Water Bonding Fitting, PB-2008$3799 Sta-Rite 08417-0005 white adjustable floor inlet cover plate Sta-Rite White Adjustable Floor Cover Plate, 08417-0005$3999 Waterway 400-5080 2 in. union, male pipe thread by female slip Waterway 2" Union, Male Pipe Thread by Female Slip, 400-5080$1899
Waterway 640-1900 V 10 inch Tru Flo cover and frame in white Waterway 10" Tru Flo Cover and Frame, White, 640-1900 V$3899 Hayward GLX-CELL-UNION 2 inch union nut and tail piece Hayward 2" Union (Nut and Tail Piece), GLX-CELL-UNION$4599 Jandy R0522900 universal half union kit Jandy Universal Half Union, R0522900$3499 AquaStar UNHT20 high temperature 2 inch threaded union AquaStar High Temperature 2" Threaded Union, UNHT20$2999 Sta-Rite PKG 188 union half, 2 inch by 2 inch slip Sta-Rite Union Half, 2" x 2" Slip, PKG 188$3199 CMP 25503-510-500 fiberglass pool dry conduit nicheless LED light wall fitting, 1.5 inch CMP Fiberglass Pool Dry Conduit Nicheless LED Light Wall Fitting 1.5", 25503-510-500$2599 CMP 21063-160-000 union assembly, 1.5 in thread by 2 in slip, hi-temp CMP Union, 1.5" Thread x 2" Slip, Hi-Temp, 21063-160-000$1799 Hayward SP14953S 1-1/2 inch slip by threaded ABS pool union Hayward 1-1/2" Slip x Threaded Union (ABS), SP14953S$2199 Pentair 270141Z black replacement union nut for SuperMax pumps and push pull valves Pentair Black Replacement Union Nut, SuperMax, 270141Z$2699 CMP 25207-801-000 equalizer suction fitting, VGB, 1-1/2 inch MIP, gray CMP Equalizer Suction, VGB, 1-1/2 Inch MIP, Gray, 25207-801-000$4399

From Hayward

This industry builds more than pools. We build moments. Hayward

Hayward equipment

Hayward Super Pump 1 HP Max Rated 115/230V, W3SP2607X10 Hayward AquaRite Salt System Complete, 40,000 Gallon Pools, W3AQR15 Hayward TracVac Suction Wall Climbing Pool Cleaner for In-ground Pools up to 40 ft, W3HSCTRACCU Hayward Pro-Grid 60 Sqft DE Pool Filter, Valve Not Included, W3DE6020
Shop Hayward equipment

Genuine Hayward parts

Hayward TurboCell T-15 Salt Cell for Inground Pools up to 40,000 Gallons, W3T-CELL-15 Hayward Genuine OEM SP1082 Skimmer Basket, SPX1082CA Hayward Genuine OEM Vari-Flo XL Filter Valve Key Cover Handle Assembly, SPX0714BA Hayward H-Series Bezel & Keypad Assembly, FDXLBKP1930
Shop Hayward parts
Pool cleaners: Hayward TracVac and PoolCleaner suction cleaners lined up on a pool deckPool automation: the Hayward app on a phone held up in front of an infinity poolPool water features: two bubblers in a tiled spa, a woman relaxing on a lounger behind
Hayward makes pumps, filters, heaters, salt systems, cleaners, lighting and automation for residential pools.Shop all Hayward

Product details

The Hayward SP1056 is a 1-1/2 inch hydrostatic relief valve, the genuine Hayward part. It is a small fitting with one job that only matters at one moment, and at that moment it matters a great deal.

The problem it solves

A full pool is heavy enough to hold itself down against the water in the ground around it. Drain the pool and that balance is gone. If the surrounding ground water has nowhere to go, it presses on the underside of the shell. The hydrostatic relief valve gives it a way in, so the pressure equalizes through the floor instead of working against it.

Where it lives

The valve sits in the main drain sump at the deepest point of the pool. It is passive: it opens on pressure difference and reseats on its own, with nothing to power, set or maintain.

When to replace it

Because it does nothing at all during normal operation, a failed hydrostatic valve gives no warning. If the pool is coming down for a liner change, a replaster or a repair, check the valve while the floor is accessible and fit a new one if there is any doubt.

Specifications
Brand Hayward
Manufacturer part number SP1056
UPC 610377045865
Type Hydrostatic relief valve
Size 1-1/2"
Shipping weight 0.15 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

Customer reviews

More from Hayward

Hayward SP0714T Vari-Flo XL 1.5 in. top mount multiport valve kit, front view Hayward SP0714T Vari-Flo XL 1.5 in. Top Mount Multiport Valve Kit$15899 Hayward CL200EF in-line automatic pool chlorinator, 9 lb tablet feeder Hayward CL200EF In-Line Automatic Pool Chlorinator, 9 lb Chemical Feeder$12499 Hayward GLX-CTL-RITE AquaRite salt system power center, control box only Hayward AquaRite Salt System Power Center (Requires Salt Cell), GLX-CTL-RITE$1,37799 Hayward SPX0714BA Vari-Flo XL valve key cover handle assembly for SP0714T Hayward Genuine OEM Vari-Flo XL Filter Valve Key Cover Handle Assembly, SPX0714BA$14799 Hayward FDXLHXA1250 heat exchanger assembly for the H250FD Universal H-Series low NOx heater Hayward Heat Exchanger Assembly for H250FD, FDXLHXA1250$1,28299 Hayward TurboCell T-15 W3T-CELL-15 salt cell, replacement for AquaRite systems Hayward TurboCell T-15 Salt Cell for Inground Pools up to 40,000 Gallons, W3T-CELL-15$1,09900 Web Price Paralevel Startup Kit, part number 004-760-2921-00 Hayward Paralevel Startup Kit, 004-760-2921-00$5799 Hayward GLX-PCB-PRO main PCB for Goldline ProLogic and AquaPlus controls Hayward Main PCB Replacement for Goldline ProLogic Automation and Chlorination After 10/2008, GLX-PCB-PRO$1,07599 Hayward SP10841 Auto-Skim skimmer for vinyl and fiberglass pools, white with square lid Hayward Auto-Skim Skimmer for Vinyl/Fiberglass Pools, 1.5" FPT, Square Lid, White, SP10841$19299 Hayward SPX0714L cover o-ring for SP0714T Vari-Flo XL valve Hayward Cover O-Ring for SP0714T Vari-Flo XL Valve, SPX0714L$1799
Paramount 005422901500 two lamp UV kit with boot and o-ring for HydraPure and Ultra UV2 sanitizers Paramount 2-Lamp Kit with Boot and O-Ring for HydraPure and Ultra UV2 Sanitizers, 005422901500$26899 Hayward W3T-CELL-9 TurboCell T-9 salt cell with 15 ft cord Hayward TurboCell T-9 Salt Cell for Inground Pools up to 25,000 Gallons, Genuine AquaRite Replacement, W3T-CELL-9$89900 Web Price Hayward SP0710X62 Vari-Flo 1.5 in. side mount multiport valve for Pro Series sand filters Hayward Vari-Flo 1.5" Side Mount Multiport Valve for Sand Filters, SP0710X62$18899 Hayward SPX1082CA genuine OEM skimmer basket, 7 in. top diameter Hayward Genuine OEM SP1082 Skimmer Basket, SPX1082CA$2399 Hayward SPX1091Z7 1-1/2 in. combo hose adapter, 2 pack Hayward 1-1/2" Combo Hose Adapter for Filters, Pumps, Skimmers and Chlorine Feeders (2 Pack), SPX1091Z7$899 Hayward SPX0740BA key cover and handle assembly for SP740DE multiport valve Hayward OEM Key Cover and Handle Assembly for SP740DE, SPX0740BA$19799 Hayward CX200XRE 200 sq. ft. replacement filter cartridge for the SwimClear C200S Hayward Genuine OEM SwimClear C200S Filter Cartridge, CX200XRE$20299 Hayward HLXPROUPG Pro Logic Retrofit Kit, OmniPL Hayward Pro Logic Retrofit Kit, OmniPL, HLXPROUPG$1,99900 Web Price Hayward SP071620T 2 in. top mount backwash valve with clamp for Pro Series S310T and S310T2 Hayward 2" Top Mount Backwash Valve with Clamp, Fits Pro Series Sand Filters S310T / S310T2, SP071620T$25399 Hayward FDXLGSV0003 natural gas valve kit for Universal H-Series FD heaters Hayward Natural Gas Valve Kit, FD Series, FDXLGSV0003$41899

Questions and answers

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

What does a hydrostatic relief valve actually do?
When a pool is drained, ground water outside the shell is no longer balanced by the water inside it. The valve lets that ground water bleed up into the empty pool rather than push on the structure.
What size is it?
1-1/2 inch. Hayward part number SP1056.
Where does it go?
In the main drain sump, the lowest point of the pool, so relief happens where the pressure is greatest.
Do I need to do anything to operate it?
No. It is a passive valve. It opens when the pressure outside exceeds the pressure inside and reseats itself afterwards.
Ask your own question