How often should a grease trap be emptied?
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It depends on covers served — high-volume kitchens often need weekly to monthly emptying, lower-throughput sites can go longer. We assess your trap and set a schedule matched to actual fat build-up rather than a generic interval.
What happens if we don't manage FOG properly?
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Repeated grease blockages traced back to your kitchen can trigger enforcement action from your water company, on top of the cost and disruption of mid-service drain failures and the food hygiene risk of backed-up drainage.
Do you jet downstream drainage as well as empty the trap?
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Yes — emptying the trap alone doesn't remove fat that's already passed it and started building on the pipe walls further down. Planned downstream jetting is part of a proper FOG maintenance programme.
How much does grease trap maintenance cost?
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Costs depend on trap size, covers served and schedule frequency — we quote a fixed maintenance plan after assessing your kitchen, rather than a one-size price. Emergency clearance callouts are quoted individually.
Can you provide compliance paperwork for our water company?
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Yes — every visit generates a waste transfer note and maintenance record you can produce on request from your water company, landlord or environmental health officer.
Do you offer emergency callouts if a kitchen drain blocks during service?
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Yes, 24/7. We understand a blocked kitchen drain mid-service is a business-stopping emergency, not a next-week booking.
What's the difference between a passive grease trap and an AGRU?
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A passive trap relies on fat cooling and floating to separate naturally and needs periodic manual emptying. An automatic grease removal unit (AGRU) skims fat continuously and needs less frequent manual intervention — better suited to higher-volume kitchens.
Are you a registered waste carrier for grease waste?
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Yes — all grease and FOG waste is removed and disposed of under our registered waste carrier licence, with full documentation provided.
Can you help if our current schedule isn't stopping blockages?
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Yes — this usually means the schedule is under-sized for your actual covers, or downstream jetting has been skipped. We'll assess and reset the schedule based on what we find rather than just repeating what isn't working.
Can I check your reviews before booking?
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Yes — we're rated 9.67/10 across 197 reviews on Checkatrade. Read them before you call if you want independent proof rather than taking our word for it.
Do you cover my postcode?
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Yes — Overflow is based in Bracknell (RG12) and we run grease management jobs daily across Bracknell, Wokingham, Maidenhead, Windsor, Ascot, Reading, Woodley, Woking and West London, reaching out into Surrey, Oxfordshire, Buckinghamshire and Hampshire. If you're inside the M25/M4 corridor or nearby, you're in our patch. Call 07949 996627 and we'll confirm an arrival window on the call.