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RP13

Yard - underground drainage pipework

Countryside Stewardship open_in_new View on RPA Website

£2.02

metre · one-off

format_list_bulleted What to do

  • Install 100mm or 150mm (internal diameter) drains.
  • Excavate trenches that are at least the width of the pipes outside diameter plus 300mm.
  • Lay pipes on clay or sand that is at least 100mm thick.
  • Avoid settlement of solids or semi-solid material in water drains by laying pipes to a fall of no less than 1 in 60 for 100mm internal diameter pipes, or no less than 1 in 100 for 150mm internal diameter pipes.
  • Place inspection pits at no more than 90m apart in straight lines.
  • Only use uPVC pipes with sealed joints and join them according to the manufacturer’s instructions.
  • Backfill the hole when the pipe is laid to at least 600mm in areas without traffic or 900mm in areas with traffic.
  • Use compacted excavated material such as smooth stone, clay or sandy soil for backfill and remove any surplus.
  • Where it is not possible to backfill to 600mm or 900mm in areas with traffic, wrap the pipes in plastic sheeting and encase in at least 150mm of concrete.

schedule When to do

checklist How to do and evidence required

  • Written support from your Catchment Sensitive Farming adviser.
  • Photographs of the site during the different stages of construction, or contracts, invoices or other documents confirming the technical specification for the completed works.
  • Photographs of the completed works.
  • Any consents or permissions connected with the work.
  • Receipted invoices or bank statements where a receipted invoice is unavailable.
  • Photographs of site before works start.

View Official Guidelines

Access detailed information about this action on the RPA website

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info Additional Information

RP13: Yard - underground drainage pipework - GOV.UK

Contents

  1. How much you'll be paid
  2. How this item benefits the environment
  3. Where you can use this item
  4. What you must do to use this item
  5. Evidence you must keep
  6. Other items you can use with this item
  7. Advice to help you use this item
  8. British Standards
  9. Separating water and slurry

How much you’ll be paid

£2.02 per metre (m).

How this item benefits the environment

This item improves existing outdoor yards, reducing the risk of runoff and water pollution.

This item can help you protect, recover and improve biodiversity on your land.

Where you can use this item

You can only use this item with support from Catchment Sensitive Farming in areas targeted to reduce water pollution from agriculture

Catchment Sensitive Farming provides advice where there are water quality or flood risk issues linked to farming.

You’ll need to get relevant advice, permits or consents from the Environment Agency, lead local flood authority or internal drainage board before you start any work.

You must also contact your local planning authority to check if planning permission is needed.

You cannot use this item on:

What you must do to use this item

You must:

  • install 100 millimetres (mm) or 150mm (internal diameter) drains
  • excavate trenches that are at least the width of the pipes outside diameter plus 300mm
  • lay pipes on clay or sand that is at least 100mm thick
  • avoid settlement of solids or semi-solid material in water drains by laying pipes to a fall of no less than 1 in 60 for 100mm internal diameter pipes, or no less than 1 in 100 for 150mm internal diameter pipes
  • place inspection pits at no more than 90m apart in straight lines
  • only use uPVC pipes with sealed joints and join them according to the manufacturer’s instructions
  • backfill the hole when the pipe is laid to at least 600mm in areas without traffic or 900mm in areas with traffic
  • use compacted excavated material such as smooth stone, clay or sandy soil for backfill and remove any surplus

Where it is not possible to backfill to 600mm or 900mm in areas with traffic, you must wrap the pipes in plastic sheeting and encased in at least 150mm of concrete.

Evidence you must keep

You must keep written support from your Catchment Sensitive Farming adviser and provide it with your application.

You must also keep and provide with your claim:

  • photographs of the site during the different stages of construction, or contracts, invoices or other documents confirming the technical specification for the completed works
  • photographs of the completed works
  • any consents or permissions connected with the work

You must also keep and provide on request:

  • receipted invoices or bank statements where a receipted invoice is unavailable
  • photographs of site before works start

Read the record keeping and site visit requirements in the Agreement holder’s guide: Capital Grants, Higher Tier capital grants and Protection and Infrastructure grants for more information.

Other items you can use with this item

You can use this item with these items:

RP5: Cross drains

RP14: Yard inspection pit

RP15: Concrete yard renewal

Advice to help you use this item

The following advice may help you to use this item, but you do not have to follow it to get paid. It’s not part of this item’s requirements.

British Standards

Check to make sure the work meets relevant British Standards.

Separating water and slurry

Read about separating water and slurry at the Rivers Trust.

Published 2 April 2015 Last updated 3 February 2025 + show all updates

  1. 3 February 2025

General improvement for clarity.

  1. 31 January 2021

Added in links to Capital Grants manual as this option is now available for Capital Grants

  1. 7 March 2017

Updated for 2017 applications.

  1. 29 March 2016

Information updated for applications in 2016

  1. 2 April 2015

First published.