1.5kW Davey Spaquip Spa Power 600 601 800 Heater Element Tube Assembly

Name: 1.5kW Davey Spaquip Spa Power 600 601 800 Heater Element Tube Assembly
Brand: Davey
SKU: D-15146-15SP
Price: 625.00 AUD
Availability: InStock

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1.5kW Davey Spa-quip (SpaQuip) Spa Power 600 601 800 Heater Element Tube Assembly

Genuine 1.5kW Davey Spa-quip Spa Power 600, 601, 800 1500W (SP600, SP601, SP800) heater element aka tube assembly. Comes with the newer Titanium element since late 2015, which retrofits the older obsolete Teflon-coated elements and flat brass bulkhead top. Newer version is more sturdy than the older type. Comes with new klixon overtemp sensor, temperature sensor, and optical water sensor.

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

Important:

New Style Heater Wiring Diagram Instructions: SP 600 / SP 601 | SP 800 - See third image
New heaters have Titanium elements and a slightly different body. (Old style is the top version in first photo. New style is the bottom version in first photo). The old ones have been superseded by the new assembly (bottom image) with titanium element.
Must be fitted by a qualified person such as a licensed electrician.
Bare elements are not available as a spare part. Only comes as full assembly.

More Information:

Suits Davey Spa-quip Spa Power 600 & Spa Power 601 - SP600 / SP601
Suits Davey Spa-quip Spa Power 800 - SP800 / SP 800
Spa-Quip SP 750 with single element heater (twin element heaters listed here)
- Retrofit Instructions here. Note that instructions mention the new wiring looms. These are no longer included with the heater and will require an electrician to make some new wires.
Does not suit HotSpring Solana variants with female union nuts.

SP 600, SP 601, SP 800 Heater Element Sizes & Models:

1.5kW Heater -15146-15SP
2.5kW Heater -15146-20SP
3.0kW Heater -15146-30sp

Warranty: 1-Year Return to Base. Does not cover damage due to corrosive water.

Other Names:

Spa-quip Heater, Spa-quip Heater, Spa Quip Heater, Davey Spa Heater, Davey Spa-quip Heater, Spa-quip Spa Heater, Spa-quip Spa Power Heater, Davey Spa Power Heater, Spa-quip 1.5kW Heater, Spa-quip 1.5kW Heater, Spa-quip 1500W Heater, Davey 1.5kW Heater, Davey 1.5kW Heater, Davey 1500W Heater, Davey 3.5kW Heater, Spa-quip Heater Element, Spa-quip Heater Tube Assembly, Davey Heater Element, Davey Heater Tube Assembly, Spa-quip Titanium Heater, Davey Titanium Heater, Spa-quip Heater Replacement, Davey Heater Replacement, Spa-quip Heater Controller, Davey Heater Controller, D-15146-15SP, 15146-15SP, 15146, d15146-xxSP, SP600, SP601, SP800, SP1200, Q80062T, Q80066T, Q80065T, Q80038T, Q80064T, Q80045T, Q80047T, "Spa-quip 1.5kW heater replacement", "Davey 1.5kW spa heater element", "Spa-quip titanium heater tube", "Davey SP800 heater assembly", "Spa-quip SP601 1.5kW heater", "Spa-quip heater element 15146-15SP", "Davey spa heater controller SP800", "Davey spa heater replacement parts"

To the layperson, plumbing sizes and their names can be confusing due to the nominal sizes and naming conventions used.

This is not something we made up. Plumbers and manufacturers have used nominal (meaning ‘by name only’) sizing for decades.

Simply put, in plumbing, named sizes are often not the actual measurements of the pipe, fitting, or part. A PVC pipe called “50mm” or “2"” does not measure 50 mm anywhere. Instead, it follows nominal sizing, an internationally-standardised naming system.

Almost all fittings we use in the pool & spa industry use “pressure PVC” pipe & fittings. Do not confuse with “DWV” or other pipe & fittings and their names and sizes.

Use the Outside Diameter (OD) to check your pipe against fittings. Below is a quick reference for common spa & pool pipe sizes:

Imperial Name	Metric Name	Pipe Diameter (OD)
1/2"	15mm	~21.2–21.5 mm
3/4"	20mm	~26.6–26.9 mm
1"	25 mm	~33.4–33.7 mm
1.5"	40 mm	~48.1–48.4 mm
2"	50 mm	~60.2–60.8 mm
2.5"	65 mm	~75.2–75.5 mm

To reiterate, these are nominal sizes and are designed to fit matching fittings — not to measure what their name suggests. These are based on PVC Pressure Pipe AS/NZ 1477 Dimensions^1.

º Internal diameters vary slightly by manufacturer and class.
¹ Not all pool/spa fittings match these dimensions exactly. Some do not follow Australian or international standards. Chinese spas may use proprietary fittings.

Understanding Plumbing Sizes & Nominal Measurements

Plumbing sizes can be confusing. PVC and many other pipe systems use nominal sizes—the size is a name, not the exact measured dimension. This convention is used across most pool and spa systems and other plumbing areas so that pipes and fittings remain compatible.

Quick example: A 2" / 50 mm fitting is named for the pipe it connects to, but the pipe’s actual outside diameter (OD) is approx. 60.3 mm (typically ~60.2–60.5 mm in AS/NZ pressure pipe).

Another example: a 2” / 50mm o-ring may refer to a barrel union, etc that suits 50mm pipe. Eg: a “50mm Balboa Gasket” refers to a heater gasket that measure 74mm across, but suits a Balboa barrel union made for 50mm pipe (and the 50mm pipe does not measure 50mm either!)

Why pipe sizes don’t match the measurements

The Nominal Pipe Size (NPS) system standardises pipe dimensions so that pipes, fittings, valves, and accessories interoperate.

Plumbers work with these nominal names every day, but DIYers can be tripped up if they try to match by a tape-measure alone.

How to Measure Pipe Correctly

Pipe size is identified by:
- The pipe’s Outside Diameter (OD).
- The fitting’s Inside Diameter (ID) (socket opening).
Pipe Class / Schedule (e.g., Class 9, 12, 18 or Sch 40) relates to wall thickness and therefore the Internal Diameter (ID) and pressure rating.
The outside diameter of a fitting is not useful (wall thickness varies by manufacturer).

Important: For pool/spa work, most plumbing uses Pressure Pipe (AS/NZ standards) — not DWV. Always check OD and the pipe class against your equipment specifications.

Hose & Tube Dimensions

Common flexible hose sizes used in pool/spa systems (approximate IDs).

Imperial Name	Metric Name	Inside Diameter (ID)
3/8"	9–10 mm	~9 mm
3/4"	19 mm	~19 mm

BSP – British Standard Pipe Thread Sizes

BSP thread names are also nominal. The thread OD will not equal the nominal name.

BSP Thread Size Naming	Outside Diameter (mm / inch)	TPI
1/16" BSP	7.7 mm / 0.304"	28
1/8" BSP	9.7 mm / 0.383"	28
1/4" BSP	13.16 mm / 0.518"	19
3/8" BSP	16.66 mm / 0.656"	19
1/2" BSP / 15 mm	20.99 mm / 0.825"	14
5/8" BSP	22.99 mm / 0.902"	14
3/4" BSP / 20 mm	26.44 mm / 1.041"	14
7/8" BSP	30.20 mm / 1.189"	14
1" BSP / 25 mm	33.25 mm / 1.309"	11
1-1/4" BSP	41.91 mm / 1.650"	11
1-1/2" BSP / 40 mm	47.80 mm / 1.882"	11
2" BSP / 50 mm	59.61 mm / 2.347"	11
2-1/4" BSP	65.71 mm / 2.587"	11
2-1/2" BSP	75.18 mm / 2.960"	11
3" BSP	87.88 mm / 3.460"	11
4" BSP	113.03 mm / 4.450"	11
5" BSP	138.43 mm / 5.450"	11
6" BSP	163.83 mm / 6.450"	11

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D-15146-15SP