# 978381 Reduction Nipple | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta reduction nipple weighing 0.113 kg and listed for 55 applications across TAD, TD, TWD and TID engines. It supersedes 6779497, which was catalogued earlier as a reducing nipple M26-M22 — worth knowing if you are working from an older parts list that quotes that description.

## 🚤 Compatibility

-   **Engine Family:** TAD, TD, TWD, TID

Full model list at the end of this description.

## ⚙️ Key Features

-   Reduction form — steps one thread size down to another
-   Fits 55 applications across TAD, TD, TWD and TID engines
-   0.113 kg
-   Supersedes 6779497, catalogued earlier as a reducing nipple M26-M22

## 🔌 Function

Steps a line down from a larger port thread to a smaller one, sealing at both sizes in a single fitting.

## ⚠️ Common Signs of Failure

-   Weeping at either end of the reducer under pressure
-   Either thread damaged, cross-started or stripped
-   Hexagon flats rounded
-   Corrosion or pitting on a sealing face
-   Union will not seal however hard it is pulled up

## 🛠️ Service Notes

-   Check both threads against the port and the line before fitting — a reducer that is right at one end and wrong at the other is still the wrong part
-   Straight nipple 978281 covers a very similar engine list; confirm the position needs a reducer rather than a plain union

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   978381 → Supersedes 6779497

### OEM / Related Numbers

-   6779497 earlier number superseded by this part

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TD61A, TD61ACE, TD61AG, TD61AGP, TD61AP, TD61APB, TD61AW
-   Volvo Penta TD71A, TD71ACE, TD71AG, TD71AGP, TD71AP, TD71APB, TD71AW
-   Volvo Penta TID71A, TID71AG, TID71AGP, TID71AP, TID71APB
-   Volvo Penta TAD1030P, TAD1030V, TAD1030VE
-   Volvo Penta TWD1210G, TWD1210P, TWD1210V
-   Volvo Penta TWD1211V, TWD1211P, TWD1211G
-   Volvo Penta TWD710P, TWD710PB, TWD710V
-   Volvo Penta TAD730P, TAD730V
-   Volvo Penta TD121G-87, TD121GP
-   Volvo Penta TD730ME, TD730VE
-   Volvo Penta TID61AG, TID61AGP
-   Volvo Penta TWD1230ME, TWD1230VE
-   Volvo Penta TAD1230V
-   Volvo Penta TD100G
-   Volvo Penta TD1030VE
-   Volvo Penta TD1210G
-   Volvo Penta TD164KAE
-   Volvo Penta TD630VE
-   Volvo Penta TD640VE
-   Volvo Penta TWD1030ME
-   Volvo Penta TWD1031VE
-   Volvo Penta TWD1231VE
-   Volvo Penta TWD630VE
-   Volvo Penta TWD730ME
-   Volvo Penta TWD731VE
-   Volvo Penta TWD740VE

## Details

- **Price:** 62.92 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 62.92 AUD | In stock |

## Images

- 978381 Reduction Nipple | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/978381-reduction-nipple-genuine-volvo-penta)
> Updated: 2026-09-06