# 21381313 Water Pipe | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Water Pipe - Part Number: 21381313

  

A formed cooling-system water pipe used on selected Volvo Penta D13 marine propulsion and marine generating-set engines. The pipe connects the designated expansion-tank and coolant circuit components while maintaining the original mounting position and sealing arrangement.

  

⚙️ Key Features

  

• Genuine Volvo Penta formed cooling-system pipe

• Correct shape and flange alignment for the original D13 installation

• Used in marine propulsion and marine generating-set cooling systems

• Designed to seal with the specified O-ring and retaining hardware

• Supports reliable coolant circulation and expansion-tank connection

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21381313 (current Volvo Penta reference)

  

OEM / Related Numbers:

  

• 975675 - related O-ring

• 984735 - related flange screw

• 961657 - related hose nipple

• 949918 - related shut-off cock

• 23360152 - related expansion tank reference

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D13 marine propulsion cooling systems

• Volvo Penta D13 marine generating-set cooling systems

  

Typically suits:

  

• Engine models:

• D13B-E MH

• D13B-E MH (FE)

• D13B-E MG (FE)

• D13C1-B MH

• D13C3-B MH

• D13C4-B MH

  

• HP Range: Engine-rating dependent

• Engine Type: D13 inline-six turbocharged marine diesel

• Year Range: Model- and serial-number dependent

  

🔌 Function

  

Routes coolant between the expansion-tank connection and the designated engine cooling-system circuit while maintaining a sealed, correctly supported flow path.

  

Common signs of failure:

  

• Coolant leakage at the pipe flange or O-ring

• Corrosion, pitting or external rust staining

• Dried coolant residue around the joint

• Repeated coolant-level loss

• Overheating or poor coolant circulation

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 667.71 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 667.71 AUD | In stock |

## Images

- 21381313 Water Pipe | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21381313-water-pipe-genuine-volvo-penta)
> Updated: 2026-08-02