{"product_id":"davey-spaquip-hayward-69mm-union-oring-q5112","title":"Davey SpaQuip, Hayward 69mm OD Barrel Union O-Ring - Q5112 - 50mm Nominal","description":"\u003ch3\u003eDavey Spa-Quip \/ Hayward 50mm Barrel Union O-Ring - Q5112 \u003cbr\u003e69mm OD x 5mm Cross Section\u003c\/h3\u003e\n\u003cp\u003eScroll images for compatibility.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003ePhysically Stocked, unlike most \"drop-shipping\" websites.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eShipped from VIC, NSW, WA, QLD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDavey \/ Spa-Quip \/ Spa Power 50mm (nominal) Barrel Union O-Ring measures approx 69mm outside diameter, with a 5mm cross section.\u003c\/strong\u003e Also used on compatible Hayward, Piranha and PoolPower union assemblies.\u003c\/p\u003e\n\u003cp\u003eReplacement sealing O-ring for the face of a 50mm nominal barrel union. This O-ring sits between the union tail and mating union face, with the locking nut holding the connection together. Commonly used on spa pumps, pool pumps, heater tubes, spa controllers, chlorinators and filter multiport valves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSold individually. One O-ring supplied.\u003c\/strong\u003e Union nut and tail are not included.\u003c\/p\u003e\n\u003ch3\u003eQuick Identification Guide \u0026amp; Dimensions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter (OD):\u003c\/strong\u003e 69mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-Section \/ Thickness:\u003c\/strong\u003e 5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInside Diameter (ID):\u003c\/strong\u003e Approximately 59mm when calculated from nominal 69mm OD and 5mm cross-section\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnion Size:\u003c\/strong\u003e 50mm \/ 2\" nominal plumbing size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnion Pattern:\u003c\/strong\u003e Common Australian Davey \/ Spa-Quip coarse-thread barrel union style \u0026amp; Hayward unions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDavey \/ Spa-Quip Part Number:\u003c\/strong\u003e Q5112\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong style=\"font-size: 0.875rem;\"\u003eQuantity:\u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e 1 x O-ring\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant - 50mm does not mean the O-ring measures 50mm.\u003c\/strong\u003e Australian and New Zealand 50mm pressure PVC pipe measures approximately 60-61mm outside diameter. The O-ring is larger because it seals against the union face, not around the outside of the pipe.\u003c\/p\u003e\n\u003cp\u003eAlways measure the existing O-ring, or identify the original union assembly, before ordering. Used O-rings can stretch, flatten, harden or distort, resulting in different measurements.\u003c\/p\u003e\n\u003ch3\u003eWhich O-Ring Do I Actually Need?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis is the 50mm barrel union face O-ring.\u003c\/strong\u003e It seals between the union tail and the adjoining pump, heater, valve or union body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHayward unions:\u003c\/strong\u003e Some Australian Hayward 50mm union packs contain two different O-rings: one for the standard union tail and another for the threaded tail. This listing is for the standard union tail sealing position, subject to matching dimensions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm unions:\u003c\/strong\u003e If you need the smaller O-ring, \u003ca href=\"\/products\/davey-spaquip-40mm-oring\"\u003esee our Davey \/ Spa-Quip 40mm Union O-Ring here\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete 50mm union:\u003c\/strong\u003e If the locking nut or tail is damaged, \u003ca href=\"\/products\/davey-spaquip-50mm-union\"\u003esee our complete Davey \/ Spa-Quip 50mm Barrel Union here\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Symptoms of a Failed Union O-Ring\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWater dripping or weeping from the barrel union face.\u003c\/li\u003e\n\u003cli\u003eLeak continues even after the union nut has been tightened.\u003c\/li\u003e\n\u003cli\u003eExisting O-ring has become flat, hard, brittle, glazed or square-edged.\u003c\/li\u003e\n\u003cli\u003eO-ring has split, perished, swollen or become distorted.\u003c\/li\u003e\n\u003cli\u003eUnion only appears to seal when excessively tightened, risking damage to the plastic locking nut.\u003c\/li\u003e\n\u003cli\u003eLeaks appear after the union has been disconnected for maintenance or repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplacing a worn O-ring often resolves a leaking union. However, a cracked nut, distorted union tail, damaged sealing face or incorrectly aligned connection may also cause leaks.\u003c\/p\u003e\n\u003ch3\u003eCompatible Davey \/ Spa-Quip \/ Spa Power Equipment\u003c\/h3\u003e\n\u003ch4\u003eSpa Power Control Systems - Heater Tube Unions\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSpa Power SP600 \/ SP601\u003c\/li\u003e\n\u003cli\u003eSpa Power SP750\u003c\/li\u003e\n\u003cli\u003eSpa Power SP800\u003c\/li\u003e\n\u003cli\u003eSpa Power SP1000\u003c\/li\u003e\n\u003cli\u003eSpa Power SP1200\u003c\/li\u003e\n\u003cli\u003eSpa Power SP2000\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUsed on the matching 50mm heater tube barrel unions fitted to these spa control systems. Earlier and later equipment revisions may use different union assemblies.\u003c\/p\u003e\n\u003ch4\u003eDavey \/ Spa-Quip Pumps\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSpa-Quip Maxi Flow \/ Maxiflow booster pumps\u003c\/li\u003e\n\u003cli\u003eSpa-Quip Monster pumps\u003c\/li\u003e\n\u003cli\u003eSpa-Quip Powerplus pumps using the Q5112-style union\u003c\/li\u003e\n\u003cli\u003eDavey Silensor SLL300 and SLL400 pumps\u003c\/li\u003e\n\u003cli\u003eDavey Silensor SLL series using the matching 50mm union\u003c\/li\u003e\n\u003cli\u003eDavey PowerMaster pumps using compatible 50mm barrel unions\u003c\/li\u003e\n\u003cli\u003eDavey PowerMaster Eco pumps using compatible 50mm barrel unions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Not every Davey Silensor or PowerMaster pump uses the same union size. Some smaller pumps use 40mm connections, while others use 40\/50mm combination unions. Check the actual union and O-ring dimensions.\u003c\/p\u003e\n\u003ch4\u003eDavey Chlorinators, Brominators \u0026amp; Filters\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDavey AquaReviva chlorinators\u003c\/li\u003e\n\u003cli\u003eDavey ChloroMatic EcoSalt MES series\u003c\/li\u003e\n\u003cli\u003eEcoMatic Compact and EcoMineral chlorinators\u003c\/li\u003e\n\u003cli\u003eDavey BMSC and CN series chlorinators\u003c\/li\u003e\n\u003cli\u003eDavey EcoSpa brominators\u003c\/li\u003e\n\u003cli\u003eDavey FG28, FG32 and FG36 sand filter multiport valves\u003c\/li\u003e\n\u003cli\u003eMonarch \/ Davey EcoPure and Reliance MK3 filter multiport valves using the M8200 assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese applications use the Davey \/ Spa-Quip 50mm union O-ring pattern. Check the relevant sealing position and original assembly before purchasing.\u003c\/p\u003e\n\u003ch3\u003eDavey \/ Spa-Quip Associated Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ5112:\u003c\/strong\u003e Original 50mm union O-ring reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ5112-1:\u003c\/strong\u003e Supplier reference used for the 50mm union O-ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePL-BS5112:\u003c\/strong\u003e Additional trade catalogue reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ5114BK-SET:\u003c\/strong\u003e Complete union kit containing Q5112 O-ring, Q5114BK-10 tail and Q5113BK locking ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e48722 \/ 48722B \/ 48722BSP:\u003c\/strong\u003e Associated Davey 50mm union assembly references\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe complete union assembly numbers are included for identification and are not individual O-ring part numbers.\u003c\/p\u003e\n\u003ch3\u003ePiranha Spa Pumps\u003c\/h3\u003e\n\u003cp\u003eAlso used on Piranha spa jet pumps and two-speed pumps fitted with the compatible 50mm coarse-thread barrel union pattern.\u003c\/p\u003e\n\u003cp\u003eSome Piranha pumps use different union assemblies. Compare your existing O-ring and union face before ordering.\u003c\/p\u003e\n\u003ch3\u003eHayward 50mm Barrel Unions\u003c\/h3\u003e\n\u003cp\u003eSimilar 50mm barrel unions were widely used on older Australian Hayward pumps, multiport valves and sand filters.\u003c\/p\u003e\n\u003cp\u003eHayward's Australian distribution and parts history includes Clevaquip, the Melbourne-based pool equipment distributor in which Hayward acquired a majority interest in 2011. As a result, older Australian Hayward equipment may use legacy Clevaquip-style part references such as UN5050 rather than the usual Hayward SPX-style numbering.\u003c\/p\u003e\n\u003ch4\u003eHayward Pumps\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eHayward Super Pump II, where fitted with the matching Australian 50mm union assembly\u003c\/li\u003e\n\u003cli\u003eOther older Hayward pumps using the corresponding 50mm barrel union\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHayward Multiport Valves\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSP0715 - 50mm\u003c\/li\u003e\n\u003cli\u003eSP0716 - 50mm\u003c\/li\u003e\n\u003cli\u003eSP0715XR50 - 2\" valve configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHayward Sand Filters\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eS244T2C\u003c\/li\u003e\n\u003cli\u003eS270T2C\u003c\/li\u003e\n\u003cli\u003eS310T2C\u003c\/li\u003e\n\u003cli\u003eS360T2C\u003c\/li\u003e\n\u003cli\u003eS244S\u003c\/li\u003e\n\u003cli\u003eS310S\u003c\/li\u003e\n\u003cli\u003eS360\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eHayward DE Filters\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDE2420\u003c\/li\u003e\n\u003cli\u003eDE3620\u003c\/li\u003e\n\u003cli\u003eDE4820\u003c\/li\u003e\n\u003cli\u003eDE6020\u003c\/li\u003e\n\u003cli\u003eDE7220\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHayward filter compatibility:\u003c\/strong\u003e The filter model alone is not sufficient to identify the O-ring. Check that the filter uses the applicable 50mm multiport valve or union assembly, including SP0715XR50 where relevant.\u003c\/p\u003e\n\u003ch4\u003eHayward Associated Union Part Numbers\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUN5050 - Legacy Australian \/ Clevaquip-style union reference\u003c\/li\u003e\n\u003cli\u003eSP50RPAUUNPAK\u003c\/li\u003e\n\u003cli\u003e20-SP50RPAUUNPAK\u003c\/li\u003e\n\u003cli\u003e20-SP50RPAUUNPK\u003c\/li\u003e\n\u003cli\u003eSP50RPT - Single union reference\u003c\/li\u003e\n\u003cli\u003eSP24X50AUUNPAK - Three-union pack\u003c\/li\u003e\n\u003cli\u003e20-SP24X50AUUNPAK\u003c\/li\u003e\n\u003cli\u003eHAY-56-91003 - Trade catalogue reference\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant - Hayward union O-rings:\u003c\/strong\u003e Hayward SP50RPAUUNPAK and SP24X50AUUNPAK union packs include separate threaded-tail and standard union-tail O-rings. They are different sealing positions and should not be confused.\u003c\/p\u003e\n\u003cp\u003eThe above numbers identify associated Hayward union assemblies, not confirmed direct cross-reference part numbers for Davey Q5112. This O-ring is intended for the matching standard union-tail sealing position only. Confirm the original O-ring dimensions and sealing face before ordering.\u003c\/p\u003e\n\u003ch3\u003ePoolPower Chlorinator Cells\u003c\/h3\u003e\n\u003cp\u003eAlso used on some older PoolPower chlorinator cells fitted with the corresponding 50mm barrel union.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e On some PoolPower cells, this O-ring is used on one end only. The opposite end may have a different seal or connection. Check before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation \u0026amp; Fitting Tips\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolate the equipment:\u003c\/strong\u003e Switch off the pump or spa system, isolate the power supply as appropriate and relieve water pressure before opening the union.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove the old O-ring:\u003c\/strong\u003e Inspect the seal for flattening, cracking, swelling or hardening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean the sealing faces:\u003c\/strong\u003e Remove dirt, grit, debris and old sealant from the union tail and mating face.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect the plastic components:\u003c\/strong\u003e Check the union nut, tail and mating body for cracks, warping, scoring or damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit the new O-ring:\u003c\/strong\u003e Install without stretching, twisting or pinching it. Fit dry where specified by the manufacturer, or use a small amount of compatible silicone-based O-ring lubricant where permitted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconnect the union:\u003c\/strong\u003e Align the mating faces correctly and tighten the union nut according to the manufacturer's instructions. These unions generally seal through O-ring compression, not excessive thread tension.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck for leaks:\u003c\/strong\u003e Restore operation and inspect the connection under normal operating conditions.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eAvoid petroleum-based grease or Vaseline.\u003c\/strong\u003e Petroleum products can damage or swell some rubber sealing materials. Use only lubricants compatible with the O-ring material and equipment manufacturer's instructions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo not overtighten plastic union nuts.\u003c\/strong\u003e Excessive force can crack the locking ring or damage the sealing faces. If a new O-ring does not seal with correct assembly, investigate the mating surfaces and union components rather than continually tightening the nut.\u003c\/p\u003e\n\u003ch3\u003eImportant Compatibility Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoarse-thread versus other union patterns:\u003c\/strong\u003e More than one 50mm barrel union design is used in Australia. The nominal plumbing size alone does not establish O-ring compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread style is not an O-ring measurement:\u003c\/strong\u003e Compare the sealing face, O-ring diameter and cross-section, not only the thread pitch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmerican-style spa pump unions:\u003c\/strong\u003e Many Aqua-Flo, LX, SpaNET, Waterway and other jet pumps use a different 2\" pump union arrangement with different seals. Do not assume this Davey O-ring will fit them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOld or distorted O-rings:\u003c\/strong\u003e A worn seal may measure differently from a new one. Where possible, identify the union from its original part number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel variations:\u003c\/strong\u003e Manufacturers may change unions or fittings between production runs. Always check the actual connection fitted to your equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor alternative spa pump union designs, \u003ca href=\"\/products\/aquaflo-davey-lx-spanet-whirlpool-50mm-2-pump-heater-barrel-union-joiner\"\u003esee our Aqua-Flo \/ LX \/ SpaNET \/ Waterway 50mm pump union range here\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eNot Sure Which Union O-Ring You Need?\u003c\/h3\u003e\n\u003cp\u003eWe stock a range of pump, heater and spa barrel union O-rings. Many look similar but have different diameters, thicknesses and sealing profiles.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, compare the original O-ring dimensions, union sealing face and equipment model. If you are unsure, contact us with clear photographs and measurements so we can help identify a suitable replacement.\u003c\/p\u003e\n\u003ch3\u003eAlso Known As - Alternative Names \u0026amp; Search Terms\u003c\/h3\u003e\n\u003cp\u003eSpa-Quip 50mm O-ring, SpaQuip union O-ring, Davey Q5112, Q5112-1 O-ring, Spa Power 601 O-ring, SP600 O-ring, SP800 O-ring, SP1000 O-ring, SP1200 O-ring, SP2000 O-ring, Maxiflow union O-ring, Maxi Flow pump union seal, Silensor SLL O-ring, PowerMaster union O-ring, Monster pump union seal, Powerplus pump O-ring, Piranha pump union O-ring, heater tube union O-ring.\u003c\/p\u003e\n\u003cp\u003e50mm barrel union O-ring, 2 inch union O-ring, 69mm OD O-ring, 5mm thick O-ring, 50mm pump union seal, 50mm heater union gasket, barrel union face seal, Hayward UN5050 O-ring, Hayward SP0715 union O-ring, Hayward SP0716 union O-ring, Super Pump II union O-ring, SP50RPAUUNPAK O-ring, SP24X50AUUNPAK O-ring, Clevaquip union O-ring, PoolPower chlorinator cell O-ring, coarse-thread union O-ring.\u003c\/p\u003e","brand":"Davey","offers":[{"title":"Default Title","offer_id":19487588712505,"sku":"Q5112","price":6.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/davey-spaquip-hayward-69mm-od-barrel-union-o-ring-q5112-50mm-nominal-plumbing-fittings-420.webp?v=1794123366","url":"https:\/\/hasp.com.au\/products\/davey-spaquip-hayward-69mm-union-oring-q5112","provider":"Heater and Spa Parts","version":"1.0","type":"link"}