Hertfordshire · Grease trap cleaning
Grease Trap Cleaning in Old Knebworth
Emptying and cleaning of under-sink and inline grease traps in commercial kitchens for businesses, landlords and public buildings in Old Knebworth. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- An under-sink trap that keeps filling up
- A routine grease trap service
- A grease trap that hasn’t been emptied in a long time
Commercial kitchens in Old Knebworth
Food Standards Agency records list about 17 restaurants, cafés and works canteens and about 11 takeaways and sandwich shops within about 1.5 miles of central Old Knebworth. Fat from washing up sets hard in pipes, and kitchens like these produce plenty of it. It’s North Hertfordshire council that sends environmental health officers to food businesses in Old Knebworth. Grease behind equipment or on a ceiling is the kind of thing an inspection can note. Keeping a record of deep cleans and grease trap visits helps at inspection time.
Healthcare kitchens, like those at hospitals such as Lister Hospital (about 3.7 miles north), cook for long hours, so deep cleans and grease trap work are planned around patients’ meals. For schools such as Barnwell School, deep cleans and grease trap work are normally booked for the holidays. If you look after a hall kitchen near Church of St Mary and St Thomas or anywhere in Old Knebworth, a deep clean between busy seasons is easier than a scramble before a big event.
Old Knebworth is about 3 miles south-west of Stevenage, in Hertfordshire. Anywhere in SG3, we can carry out grease trap cleaning at your premises. Old Knebworth is one of 381 towns, villages and districts in Hertfordshire we cover for grease trap cleaning. We also work in London, about 26 miles from Old Knebworth.
Our technicians cover all of SG3 for grease trap cleaning and the roads nearby. Streets in the area include Old Knebworth Lane and Park Lane, all of which we cover for grease trap cleaning. Neighbouring places we cover for grease trap cleaning include Nup End Green (1 mile south-west), Driver's End (1 mile south-west), Rableyheath (1 mile south), Pottersheath (1 mile south) and Langley (2 miles north-west). Larger places within reach include Hemel Hempstead (13 miles south-west), Stevenage (3 miles north-east), St Albans (10 miles south-west), Welwyn Garden City (5 miles south), Harpenden (7 miles south-west) and Hitchin (6 miles north-west).
Around Old Knebworth
We work in commercial kitchens and buildings around Knebworth Park and Robin Hood And Little John Public House, among other places. For rail, the closest station is Knebworth station, roughly 1 mile east. A little further out are Lister Hospital (3.7 miles north) and Stevenage Museum (2.2 miles north). Green spaces nearby include Mardley Heath.
Grease trap cleaning in Old Knebworth
A neglected grease trap stops doing its job. Further down the pipe, the grease cools and hardens and the result is blocked drains and bad smells. A trap that’s cleaned regularly keeps grease where it belongs. Typical jobs include an interceptor full of grease and solids and foul odours from the grease trap, across under-sink grease traps, inline grease traps and pot wash sinks.
For a kitchen in or near Old Knebworth, the visit is planned ahead, around opening times and the journey, and the deep clean is the same as anywhere: walls, floors, ceilings and equipment.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Where
- Old Knebworth (SG3)
- Region
- Hertfordshire
- Reporting
- Photo report after every visit
- Quote
- A fixed price before work begins
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
What grease trap cleaning cannot fix
In fairness, there are a few things this work will not fix:
- Leaking pipework or sink wastes, which need a plumber
- Grease deep in the drains, which needs jetting by a drainage contractor
- Sewer problems outside the premises
Not sure which it is? You can call us on 0345 646 2711 or email us and we will tell you honestly before booking.
What we work on in Old Knebworth
- Kitchen waste pipes
- Pot wash sinks
- Restaurants and takeaways
- School and care home kitchens
- Under-sink grease traps
- Inline grease traps
Fixed quotes for grease trap cleaning in Old Knebworth
Every site gets its own quote. These are the things that affect it:
- What state the system is in
- How easy every part is to reach
- The times the site is available
- Site requirements such as sign-in and permits
What you pay depends on the size of the system, the condition it’s in and access to every part of it. We give you a fixed price before any work starts, so there are no surprises.
Asking for a quote
When you call or email, these details help:
- The times we could work without disrupting the site
- Any previous report or certificate
- Where the site is and what kind of site it is
- Any symptoms, from odd noises to smells or leaks
Want a quote for grease trap cleaning? Please call us on 0345 646 2711, or email photos with a few details about the site. We will talk you through the work and give you a fixed quote before anything is booked.
What staff can safely do
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but the parts you cannot see still need a specialist at the right interval.
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. That is our job.
Keeping the system healthy
No system stays clean for ever, but care slows the build-up. A few tips:
- Fit sink strainers to catch food scraps
- Act on gurgling or smelly drains
- Don’t rely on hot water to clear grease
- Wipe grease off pans before washing them
We will suggest when the trap should be cleaned again. It’s based on how full it was and how busy the kitchen is.
If the kitchen has got busier, the trap fills faster. Shortening the cleaning interval now keeps the drains flowing.
What we do, step by step
A visit follows the same order every time: sheeting and protection first, make the system safe, do the work, clear away and leave you the report. On site, the work takes an hour or two in most kitchens, depending on the size and condition of the trap. A few photos of the system help us make the most of a visit to a place like Old Knebworth.
- First, we locate the grease trap and look at the pipework around it.
- The sinks feeding the trap are kept out of use while we work.
- Built-up fat, oil and grease is removed from the trap.
- Every part of the trap is scraped and cleaned, including the baffles.
- We put it back together, run water through and remove the waste.
How to prepare
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Mention any sign-in, permit or induction we need
- Make sure someone can let us in and lock up afterwards
How to get a quote
Every quote begins with a look at the system, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work so you know the cost before work begins.
Advice
Questions from Old Knebworth
Can the work in Old Knebworth be done at night or at weekends?
Yes. We work evenings, overnight and at weekends. That way a site in Old Knebworth doesn’t have to lose a day’s trading. When you call us on 0345 646 2711 or drop us a line, mention when the site is quiet.
Who inspects food businesses in Old Knebworth?
Kitchens in Old Knebworth are inspected by North Hertfordshire council’s environmental health officers. An officer may look behind equipment and at drains, so it pays to have the deep clean booked before those areas build up.
How much notice should we give?
For planned work, earlier is better, particularly if your next visit is nearly due. Emergencies are different, because our line is open 24/7.
What’s TR19?
TR19® is the BESA specification for keeping ventilation systems clean. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
Does the report say when we need you again?
Yes. Every report includes a recommended date for the next visit, based on use and what we found.
Do we need to close while you work?
Typically not. Out-of-hours visits keep the disruption down. Larger jobs can be phased over several visits to keep things running.
Do you work in Old Knebworth?
Yes. We work in Old Knebworth and the rest of Hertfordshire, as part of our work across South East England and London. To book, give us a ring on 0345 646 2711 or email us.
What happens if you can’t reach some of it?
The report shows them clearly. In ductwork, new access panels are often the answer, which we can install.
Part by part
Baffles and outlets
The outlet carries the separated water on to the drain. If it’s blocked or greasy, the trap backs up.
Inline grease traps
Inline traps may be under a floor panel or in a cupboard. We check how to reach it before the visit.
Towns and villages near Old Knebworth
What else we do in Old Knebworth
Why act early in Old Knebworth
Once the trap is full, grease heads for the drain. There it sets and narrows the pipe until water can’t get through. Cleaning the trap regularly is far easier than clearing a blocked drain. Planning a trip to Old Knebworth ahead is easier for everyone than a rushed one.
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Call for a fixed quote and we will explain each part.
Why choose Duct Doctor in Old Knebworth
- We diagnose before we treat
- A written report with pictures after each visit
- CHAS and SafeContractor accredited, with ISO 9001
- A fixed price before any work starts