SK-950 Vac Plate (Vacuum Plate)
SK-950 Vac Plate (Vacuum Plate) is temporarily out of stock and will ship as soon as it's available.
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SK-950 Vac Plate (Vacuum Plate)
SK-950 Vac Plate (Vacuum Plate) is temporarily out of stock and will ship as soon as it's available.
SK-950 Vac Plate (Vacuum Plate)
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
Vac plate (vacuum plate) to suit the Filtrite SK950 skimmer box, sold over the years as Filtrite, Quipmaster and Quiptron Filtrite SK950, and the later SK952 and SKB952. It sits over the skimmer basket so a manual vacuum or suction cleaner hose can draw through the skimmer. Approx. 240mm across (the genuine plate is quoted at 239mm outer and 220mm inner) with a threaded centre port for the vacuum hose. Equivalent to the genuine Quiptron / Filtrite 5161000 plate, which is marked SK952 on top.
Check before ordering: not for the Filtrite SK900, SKB900 or SKB910, which take a smaller 220 to 228mm plate, and not for the Pentair / Onga Quiptron skimmer, which takes the Quiptron Vac Plate PA-514. The SK950 plate O-ring is Onga 5162400.
Product details
- Product: SK-950 Vac Plate (Vacuum Plate)
- Part number: PA-517
- Type: skimmer box vac plate (vacuum plate)
- Diameter: approx. 240mm (genuine plate quoted at 239mm outer, 220mm inner)
- Centre port: threaded
- Fits: Filtrite / Quipmaster / Quiptron SK950, SK952 and SKB952 skimmer boxes
- Material: heavy-duty plastic
- O-ring part number: Onga 5162400
- Cross reference: Quiptron / Filtrite 5161000 (SK952), HABCO H517
See the full range of pool vac plates (vacuum plates).
Confirm product is correct before ordering. Contact us if unsure.
Common search terms: SK950 vac plate, SK-950 vacuum plate, Filtrite SK950 vac plate, Quipmaster SK950 vacuum plate, Quiptron SK950 plate, SK952 vac plate, SKB952 vacuum plate, Filtrite 5161000, 240mm vac plate, pa-517, WWDG SpaPro.
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 Dimensions1.
- 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.
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).
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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PA-517
