Vac Plate (Vacuum Plate) Elbow 90 Degree
Vac Plate (Vacuum Plate) Elbow 90 Degree is temporarily out of stock and will ship as soon as it's available.
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Vac Plate (Vacuum Plate) Elbow 90 Degree
Vac Plate (Vacuum Plate) Elbow 90 Degree is temporarily out of stock and will ship as soon as it's available.
Vac Plate (Vacuum Plate) Elbow 90 Degree
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
90 degree twist-lock elbow for Hayward-pattern vac plates (vacuum plates). The elbow pushes into the notched centre hole of the plate and turns to lock, so the vacuum hose runs off the plate sideways instead of straight up, and the hose cannot pull the plate out of position. The hose end is the Hayward combination size and takes both 32mm (1 1/4 inch) and 38mm (1 1/2 inch) pool hoses. Equivalent to the Hayward SPX1088H (SP1088-H), the elbow supplied with the SP11041 and SP11071 Skim-Vacs.
Check before ordering: this elbow suits the Hayward twist-lock plates only: the SP1107A plate PA-471 (SP1089 skimmer) and the SP1104A plate PA-470 (SP1090, SP1091 and SP1092 skimmers). It is not a push-in tapered elbow for other brands of vac plate.
Product details
- Product: Vac Plate (Vacuum Plate) Elbow 90 Degree
- Part number: PA-379
- Type: vac plate (vacuum plate) hose elbow, 90 degree twist-lock
- Hose end: 32mm (1 1/4 inch) and 38mm (1 1/2 inch) pool hose
- Plate end: twist-lock tabs for the Hayward SP1104A and SP1107A plates
- Fits: Hayward Skim-Vac plates SP1104A (PA-470) and SP1107A (PA-471); Hayward SP1089, SP1090, SP1091 and SP1092 skimmers
- Cross reference: Hayward SPX1088H, SP1088-H, HABCO H379
See the full range of pool vac plates (vacuum plates).
Confirm product is correct before ordering. Contact us if unsure.
Common search terms: vac plate elbow 90 degree, vacuum plate elbow, Hayward vac plate elbow, Hayward SPX1088H, SP1088H elbow adaptor, SP1088-H, Hayward skim vac elbow, SP1089 elbow, SP1107A elbow, SP1104A elbow, 38mm vacuum hose elbow, pa-379, 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-379
