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Davey SpaQuip 50mm Barrel Union - Spapower, Silensor, Maxiflow, Nipper, Hayward

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Davey Spa-quip (SpaQuip) 50mm Barrel Union - Spapower, Silensor, Maxiflow, Nipper, Hayward

  • Physically Stocked, unlike most "drop-shipping" websites.
  • Shipped from VIC, NSW, WA, QLD

Davey / Spa-quip / Hayward / Piranha 50mm Coarse-Thread Barrel Union Assembly (Nut + Tail + O-ring) - 50mm barrel union plumbing fitting with coarse threads. Supplied as a complete set: union nut + tail + 50mm O-ring. These have been coloured black, red, white.

Davey / Spa-quip

Davey & Spa-quip spa control systems (heater unions)

  • Spa Power controllers: SP600, SP601, SP750, SP800, SP1000, SP1200, SP2000
  • SpaPower 600, 601, 750, 800, 1000, 1200 control systems (heater tube unions)

Davey & Maxiflow pumps

  • Silensor: SLL300, SLL400
  • PowerMaster 3-phase: PM4503
  • PowerMaster Variable: PM400V
  • ProMaster VSD: PM400PV, PM400BV
  • Power Master Eco: Power Master Eco models using the same 50mm coarse-thread union style
  • Maxi-Flow pumps (50mm coarse-thread union style)

Davey chlorinators / automation

  • ChloroMatic Nipper: DNP15C, DNP25C, DNP35C, DNP15CLS, DNP25CLS
  • ProMatic chlorinator: 48722BSP barrel union assembly
  • Lifeguard system (AU/NZ): 48722BSP barrel union assembly

Davey filters

  • Commonly used where Davey equipment is plumbed with this 50mm coarse-thread union standard.
  • Davey Easy Clear & Davey Crystal Clear (Easyclear / Crystalclear) - check nut measurements.

Davey / Spa Quip Associated Part Numbers: Q5114BK-SET (Q5112 + Q5114BK-10 + Q5113BK), 48722BSP, 48722, 48722b, 48722b-1, 48722bsp

Hayward

Hayward pumps

  • Super Pump II

Hayward Filters

  • SP0715, SP0716, S244T2C, S270T2C, S310T2C, S360T2C, S244S, S310S, S360,
  • DE2420, DE3620, DE4820, DE6020, DE7220 -- valve size check: SP0715XR50 (2")

Hayward part numbers associated

  • SP24X50AUUNPAK
  • 20-SP50RPAUUNPK
  • 20-SP50RPAUUNPAK
  • SP50RPT
  • UN5050 / SP50RPAUUNPAK

Piranha

  • Pumps: Piranha spa jet pumps & 2-speed pumps (50mm coarse-thread union style)

Quick ID guide (avoid ordering the wrong union)

  • Size: 50mm aka 2"
  • Pipe sizing note: Australian/New Zealand 50mm pressure PVC pipe measures approximately ~60-61mm outside diameter (OD), so don’t size this union by OD alone.
  • Thread: Coarse Buttress - 4.23mm pitch (FBT/MBT)
  • Includes: union nut + tail + 50mm O-ring

Dimensions:

  • Pipe Size: 50mm Pressure PVC (nominal) with outside diameter approx ~60-61mm
  • Thread Diameter: Inner: ~75mm / Outer: ~79-80mm
  • Number of Threads: 4-5
  • O-ring Size: ~69mm OD x ~5mm cross section. (often flatten with age). Oring listed here.

Common symptoms this part solves

  • Union won’t tighten properly (stripped or cracked nut)
  • Persistent drip at the union (flattened/damaged 50mm O-ring)
  • Hairline cracks in the tail or union face causing leaks
  • Union threads damaged from over-tightening or cross-threading

Compatibility notes

  • Coarse-thread vs fine-thread: there are multiple 50mm unions in the market. This listing is for the coarse-thread style.
  • Hayward DE filters: confirm you have the SP0715XR50 (2") valve if matching the DE filter models listed above.
  • PowerMaster Eco: some variants use different union configurations, so match the union style on your pump if unsure.

May also be called - aka Search Terms

Spa Power 601 union, Spa Power 800 union, Spa Power 1000 union, Spa Power 1200 union, Spa Power 2000 union, SP601 union, SP800 union, SP1000 union, SP1200 union, SP2000 union, Maxiflo union, Hayward union, Piranha union, Spa-quip union, Spa-quip barrel union, Power Master union, WWDG PMHP Union, heater union, 50mm coarse thread union.

50mm barrel union, 50mm pump union, 50mm heater union, coarse thread union, Spa-quip union, Spa Power union, Davey 48722B union, 48722BSP union, Q5114BK-SET union, Hayward SP0715 union, Hayward SP0716 union, Super Pump II union, SpaPro Pump Union, Maxiflow union, Piranha pump union, 2" union nut tail o-ring set, union tailpiece, union O-ring 50mm, 50mm PVC pipe OD 61mm.

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48722BSP (Q5114BK-SET (Q5112 + Q5114BK-10 + Q5113BK))

Important Information
Brand Information

We are an authorised dealer, retailer, and/or service & warranty agent for many leading brands, including: Fluidra (AstralPool, Zodiac, Hurlcon), Aeware, Air Supply of the Future, Aqua-Flo, Balboa, Celsior, CG Air, CMP, Custom Moulded Products (CMP), Darlly, Davey, Del Ozone, Dontek, Edgetec, Emaux, Filtrite, Gecko, Goulds, Harwil, Henden, Herga, Honeywell, HydroAir, HydroQuip, ITT, Jandy, Joyonway, Laing, Len Gordon, Lo-Chlor, LX, LX Whirlpool, Magic Plastics, Magnum, Monarch, Onga, Pentair, PoolSystems, Presair, Raypak, Reemay, Rheem, Rising Dragon, S&P, Sensaheat, Spa-Craft, Spa-King, SpaNet, Spa-Quip, SpaTex, SpaZazz, Tecmark, Therm Products, Thermcore, Waterco, Waterway, Weld-On, Whirlpool, Xylem, and others.

We also sell parts for many spa and swim spa brands, including parts to suit Alpine Spas, Artesian Spas, AquaPulse Spas, Balboa spas, Bullfrog Spas, Caldera Spas, Canadian Spa Company, Cedar Spas, Chinese import spas, Coast Spas, Costco spas, Cyclone Spas, Davey spas, Decina, Designer Spas, Dimension One Spas, eBay spas, Endless® Spas, Fastlane Pools, Fisher Spas, Gecko spas, Halo Spas, H2O Spas, H20 Spas, Heritage Spas, HotSpring Spas, HydroQuip spas, Impact Spas, Jacuzzi, Just Spas, Just Swim Spas, LA Spas, Lanark Spas, Leisurite Spas, Maax Spas, Monarch Spas, MySpa, O2 Spas, Oasis, Sapphire Spas, Sapphire Swim Spas, SCS Spas, Signature Spas, Silver Spas, Spa Industries, Spa-Quip spas, SpaNet spas, Spas Direct, Sundance Spas, Sunrans, SwimEx, Trueform Spas, Tuff Spas, Urban Pool, Vortex®, Vortex® Swim Spas, and many others.

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  • Handy PVC Plumbing Size Info

    Plumbing sizes can be confusing. Pressure PVC pipe use nominal sizes - the size is simple a name, not the measured dimension. This convention is used across most pool and spa systems so that pipes and fittings remain compatible.

    • 50mm / 2" = ~60-61mm OD
    • 40mm / 1.5" = ~48mm OD
    • 25mm / 1" = ~33-34mm OD

  • Plug Types & Styles

    Common plug types found on spa equipment are AMP, Mini JJ, C38 (Aus 3-pin), Gecko in.link, etc. For more information please click here.

    • AMP plugs are the most common type used for over 20 years.
    • Many Mini J&J plugs are no longer available and must be modified.
    • C38 is the common Australian 3-pin plug found in normal household outlets.
    • Gecko (Aeware) in.link style plugs are no longer available and must be modified.
General Information & Disclaimers

Many products we supply are OEM-supplied and may not include retail packaging, printed instructions, or accessories. Refer to the product listing for details, or contact us if unsure.

Product images are for illustration only. Actual items may vary due to manufacturer changes, updates, and other variations. Images may show a full assembly, a partial assembly, or a specific component only. They are provided for identification purposes and do not by themselves define what is included. Please read the title and description carefully.

All products must be installed and used by qualified and experienced persons in accordance with applicable Australian standards and manufacturer requirements. We are a parts supplier, similar to an electrical, plumbing, or automotive parts supplier. We sell parts, but cannot always provide exact installation, troubleshooting, or system design advice. Buyers are expected to know what they are doing or use a qualified professional.

Contact us before ordering if your order is urgent, to confirm availability before purchasing.

® Trademark Information

All trademarks, brand names, and logos displayed on this website are the property of their respective owners. Heater & Spa Parts is an independent Australian supplier of replacement parts and accessories. Use of trademarked names, logos, and brands is for identification and compatibility purposes only, unless otherwise stated.

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