# 21662702 Vacuum Valve | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Anti-Siphon Vacuum Valve, 19mm / 3⁄4 inch - Part Number: 21662702

  

A marine anti-siphon valve installed at the high point of the seawater circuit to prevent cooling water from siphoning into the exhaust and engine after shutdown.

  

⚙️ Key Features

  

• Connection diameter: 19mm / 3⁄4 inch

• Automatic vacuum-break function

• Marine corrosion-resistant construction

• Serviceable valve element

• Designed for above-waterline mounting

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• Current OEM reference: 21662702

  

OEM / Related Numbers:

  

• 21662702

  

Aftermarket / Verified Equivalents:

  

• Johnson Pump / Albin Pump Marine 19mm anti-siphon-valve family - verify connection size

  

🚤 Compatibility

  

• Volvo Penta seawater-cooled marine engines installed at or below the vessel waterline

• Install in the seawater hose between the heat exchanger and exhaust discharge, above the vessel waterline

• Hose connection: 19mm / 3⁄4 inch

• D1-13B cooling systems using hose clamps 961667 and 961666 and hose 952970

  

🔌 Function

  

The valve admits air when the engine stops, breaking the siphon that could otherwise flood the exhaust manifold and cylinders with seawater.

  

Common signs of failure or damage:

  

• Seawater leaking from the valve

• Valve blocked by salt or debris

• Water siphoning into the exhaust after shutdown

• Valve element sticking

• Cracked housing or hose connection

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 204.27 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 204.27 AUD | In stock |

## Images

- 21662702 Vacuum Valve | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21662702-vacuum-valve-genuine-volvo-penta)
> Updated: 2026-08-02