Low Water Pressure in Horsham Rental Properties Who Is Responsible

Published August 2026 | Low Water Pressure

Landlord Obligations Under Current Regulations

Landlord responsibility for water pressure is grounded in law, not just good practice. Under Section 11 of the Landlord and Tenant Act 1985, landlords must keep in repair and proper working order the installations in a property for the supply of water. That includes the rising main, stop valves, internal pipework, and any pressure regulating equipment fitted to the property.

The Housing Health and Safety Rating System (HHSRS) also classifies an inadequate water supply as a potential hazard. If pressure is so poor that tenants can't shower properly, run a washing machine, or fill a bath in reasonable time, the property may fall short of the standard required under the Homes (Fitness for Human Habitation) Act 2018. That Act applies to all tenancies in England and in West Sussex it's enforced by local housing authorities, including Horsham District Council.

In practical terms, landlords are expected to:

• Respond to reports of low water pressure within a reasonable timeframe - typically 24 to 48 hours for issues that affect daily living
• Arrange and pay for a qualified plumber to diagnose the root cause
• Cover the cost of repairs to internal pipework, stop valves, pressure reducing valves, or booster pump equipment
• Liaise with Southern Water (the supplier serving Horsham and the surrounding area) if the issue originates at the mains supply

Our engineers see a wide range of pressure problems in rental properties across Horsham. The most common causes are a partially closed stop valve, a failing pressure reducing valve, or scaled-up pipework in older terraced and semi-detached housing stock. All of these sit firmly in landlord territory.

What Tenants Are Expected to Handle

Tenants aren't entirely off the hook. There are situations where low water pressure is caused by something the tenant has done, or where a simple check sits within the tenant's reasonable capability before raising a formal report.

Tenants are generally expected to:

• Check that the main stopcock or service valve hasn't been accidentally knocked or partially turned - these are often located under the kitchen sink or inside an airing cupboard
• Report the issue to the landlord or letting agent promptly and in writing
• Allow reasonable access for the landlord's plumber to inspect and carry out repairs
• Avoid making modifications to the plumbing system without the landlord's written permission

If a tenant has fitted an additional appliance - a dishwasher, washing machine, or unvented cylinder - without the landlord's knowledge and this has contributed to pressure problems, there could be a case for the tenant to share responsibility for repair costs. It's not common, but it does arise.

Tenants are not expected to repair pipework, fit pressure valves, or carry out any plumbing work themselves. Attempting to do so could invalidate the landlord's buildings insurance and create liability issues. Report it, document it, and let a qualified plumber handle it.

Grey Areas - Where Disputes Happen

Low water pressure disputes between landlords and tenants tend to cluster around a few recurring scenarios. Understanding these in advance can save both parties time, money, and a difficult conversation.

Mains supply pressure from Southern Water

If the pressure problem originates with Southern Water's supply to the property rather than the internal pipework, the landlord isn't strictly responsible for fixing it - that sits with the water company. However, the landlord is responsible for liaising with Southern Water, reporting the fault, and considering whether a booster pump is appropriate if mains pressure is consistently inadequate. A tenant shouldn't be left to manage that correspondence on their own.

Pressure that drops at certain times of day

In some areas of Horsham, particularly in higher density residential streets, mains pressure can dip noticeably at peak morning usage times. This isn't always a fault - it can be a characteristic of the local supply network. Southern Water's website has a facility to check whether there are known supply issues at a specific address. If pressure is only low during peak hours and there's no fault recorded, assigning clear responsibility becomes more difficult for both parties.

Shared pipework in converted flats

West Sussex has a significant number of Victorian and Edwardian properties that have been converted into flats, and shared rising mains are common in these buildings. If the issue lies in shared pipework, it typically falls to the freeholder or the managing agent, not the individual landlord. If the landlord owns the freehold, they're responsible. If there's a separate management company involved, resolution tends to be slower and the lines of responsibility can get blurred quickly.

Tenant-installed shower pumps

Sometimes a previous tenant has installed a shower pump to boost pressure, and that pump has since failed. Whose responsibility is it? If the landlord was aware of it, accepted it, and it effectively became part of the property's fixtures, it's most likely the landlord's responsibility to maintain or replace it. If it was installed without permission and never disclosed, that's a much murkier situation and one worth taking advice on.

How to Report This Issue - A Guide for Tenants

Reporting low water pressure correctly protects your position as a tenant. A verbal mention to your landlord doesn't create the paper trail you may need if the issue drags on or escalates.

Here's how to do it properly:

1. Send a written report. Email is the best option. Text messages work too but email is easier to evidence later. Include the date, a clear description of the problem, and how it's affecting your daily life - showers, washing machine performance, filling a kettle.
2. Be specific. "The water pressure is low" is less useful than "the shower on the first floor produces a trickle and the kitchen cold tap takes three minutes to fill a one-litre jug." Specific detail helps a plumber understand what they're diagnosing before they arrive.
3. Photograph or video the problem. A short video of the shower or tap performance is useful evidence if a dispute arises later. Date-stamp it if possible.
4. Check the stopcock first. Before sending any report, verify the main stopcock is fully open. It's easy to overlook and saves everyone time and an unnecessary callout.
5. Follow up if you don't hear back within 48 hours. A water supply issue affecting daily living warrants a prompt response. If you don't hear back, chase in writing and keep a record of when you did so.
6. Contact Horsham District Council's environmental health team if the landlord fails to act within a reasonable timeframe. They have powers under the HHSRS to require landlords to carry out necessary works.

If you're using the Voltrade GoFIX diagnostic tool, you can log the fault, attach photos, and generate a timestamped report that can be forwarded directly to your landlord or letting agent, which simplifies the whole reporting process considerably.

Getting It Fixed Quickly in Horsham Rental Properties

Once responsibility is established and the report is made, the practical question becomes what the fix involves and what it's likely to cost. Our engineers working across Horsham and the wider West Sussex area commonly encounter the following scenarios.

Partially closed or seized stop valve

This is the easiest fix and often the most overlooked cause. A stop valve that's only three-quarters open can significantly reduce flow throughout the property. Replacing a seized stop valve typically costs between 80 and 150 pounds including labour and can usually be completed on the same day in under an hour. It's always worth checking this first before moving on to more involved diagnostics.

Failing or incorrectly set pressure reducing valve

Most modern homes have a pressure reducing valve (PRV) fitted to regulate incoming mains pressure. These can fail or drift over time. Replacing a PRV typically costs between 150 and 280 pounds depending on access and the specification of the valve. This isn't a DIY job - an incorrectly set PRV can cause damage to pipework and connected appliances, so it needs a qualified plumber.

Scale build-up in older pipework

In older Horsham properties - particularly Victorian terrace housing - internal pipework can be narrow-bore copper that has accumulated limescale over decades. This narrows the internal diameter and restricts flow significantly, especially to upstairs bathrooms. Re-running sections of pipework or installing a scale inhibitor can help, but more extensive re-piping carries costs of between 400 and 1,500 pounds depending on the scope of work and the layout of the property.

Booster pump installation

Where mains pressure is consistently low and other remedies have been exhausted, a booster pump is often the right long-term solution. A single impeller shower pump for a gravity-fed system typically costs 120 to 200 pounds for the unit itself, with installation adding another 150 to 250 pounds. A whole-house pressurisation unit for properties with multiple bathrooms costs more - commonly between 600 and 1,200 pounds installed. For any work involving the boiler or hot water cylinder, the plumber must be Gas Safe registered. That's a legal requirement in the UK, not simply best practice.

Documentation You Should Keep

Whether you're a landlord or a tenant, keeping thorough records around a water pressure issue protects your position. If a dispute reaches a tenancy deposit scheme adjudicator or a local authority housing officer, documentation is usually what determines the outcome.

Tenants should keep:

• Copies of all written communications reporting the fault, with dates
• Notes on any verbal conversations, followed up in writing to create a record
• Photos or videos showing the problem clearly
• Any correspondence from Southern Water regarding supply issues at the address
• Records of any additional costs incurred - for example, using a laundrette because the washing machine couldn't function adequately

Landlords should keep:

• Records of all tenant reports received and the date they were acknowledged
• Invoices and job sheets from any plumber instructed, including details of what was found and what was done
• Gas Safe certificates if any work involved the boiler or hot water system
• Any written communication with Southern Water about supply pressure at the property
• Photographic evidence of the completed repair

The side with the better paper trail almost always comes out ahead in a dispute. Start as you mean to go on, even if the issue seems minor at first.

Landlord and Tenant Questions

Is a landlord legally required to fix low water pressure in a rental property?

Yes, in most cases. Under Section 11 of the Landlord and Tenant Act 1985, landlords are required to maintain installations for the supply of water in proper working order. If water pressure is poor enough to affect habitability - making showering, washing, or cooking difficult - the landlord is obliged to act. The Homes (Fitness for Human Habitation) Act 2018 reinforces this obligation for all residential tenancies in England.

How long does a landlord have to fix low water pressure?

There's no fixed statutory deadline, but the general principle is "within a reasonable time." For a water pressure issue that significantly affects daily living, most housing solicitors and local councils would expect a landlord to respond within 24 to 48 hours and arrange a repair within a few days to a week. Persistent inaction can lead the tenant to involve Horsham District Council's environmental health team, who have powers to require works.

Can a tenant withhold rent because of low water pressure?

Withholding rent is almost never the right move and can actually put the tenant in breach of their tenancy agreement, weakening their legal position significantly. The correct route is to report the issue in writing, follow up formally, and if the landlord fails to act, contact the local authority or seek advice from Citizens Advice. In some circumstances a tenant can apply to court for repair costs to be offset against rent, but this requires following the correct legal process carefully.

Who contacts Southern Water about low mains pressure - the landlord or the tenant?

The landlord should handle this. They're the property owner and typically the account holder. A tenant can check the Southern Water website for known supply issues at their address, but formally raising a fault and pursuing resolution with the water company is the landlord's responsibility. If the landlord is unresponsive, tenants can contact Southern Water directly to log the issue, but should document that they attempted to involve the landlord first.

What if the low water pressure only affects one tap or one shower?

If the issue is isolated to a single outlet, the cause is often localised rather than a whole-property problem. A blocked aerator on a tap or a limescale-clogged shower head can closely mimic low pressure without there being any actual supply fault. Tenants should try cleaning the shower head or tap aerator first. If that doesn't resolve it, report to the landlord in writing - the internal pipework serving that outlet may need attention from a qualified plumber.