Black Mammoth Plumbing and Heating Ltd
London
Checkatrade member since November 2022
Services
- General Plumbing
- Underfloor Heating Installation
- Radiator Installation
- Unvented Hot Water Cylinder Installation
- Water Supply Pipe Repairs
- Thermal Dynamics
- Water Leak Detection
- Shower Installation
- Power Flushing
- Plumbing Repairs
- Water Pumps Installation
- Tap Repair
- Blocked Sinks
- Blocked Baths
- Blocked Toilets
- Pipe Fitter
- Emergency Plumber Service
- Bathroom & Kitchen Plumbing
- Radiator Repair
- Radiator Thermostat Valve Installation
- Radiator Thermostat Valve Repair
- Shower Repair
- Underfloor Heating Repair
- Unvented Hot Water Cylinder Servicing / Repair
- Water Pumps Repair
Customer Reviews
Write a review9.83 /10
Based on 26 reviews over the past 12 months
Quality of work
9.69
Reliability
9.92
Communication
9.79
Reviews (70)
10 Boiler & hot water cylinder installation
Posted 24 June
Slava and Black Mammoth have investigated and resolved multiple issues at my residential property over the last 3 years. This has covered problems with the boiler, radiators, bathrooms, and leaks, to name a few. Regardless of the issue at hand, I have always had a great experience and his approach has been consistent - timeliness, high standard of work, personable, knowledgeable, transparent, takes the time to explain issues and remediation steps, whilst offering good economic value. The most recent work completed was a new replacement of my faulty boiler and hot water cylinder.Verified reviewerJob location: SW610 Dish washer repairs & drain unblocking
Posted 24 June
Professional experience with good communication on availability and when Slava would attend the property. Carried out work in a timely and clean manner, would recommend his plumbing services to others.Verified reviewerJob location: SW15Response from Black Mammoth Plumbing and Heating Ltd
Thank you for your feedback. I hope your dishwasher is sorted now
10 Boiler Replacement
Posted 02 June
Slava was excellent, quick to respond, communicative, explained several options and was very cleanVerified reviewerJob location: SW1310 Fixed our hot water
Posted 19 May
Had Slava come out and fix our hot water for us. He was really nice and sorted the problem out really quickly, will be calling on him again in the future.Verified reviewerJob location: SW19Response from Black Mammoth Plumbing and Heating Ltd
Thank you for your kind review – I really appreciate you taking the time to share your experience!
10 Unvented hot water cylinder installation
Posted 11 May
I recently had a hot water cylinder installed, and I couldn’t be more pleased with the service. Slava was professional, punctual, and extremely knowledgeable. The installation was completed efficiently and to a high standard. He took the time to explain everything clearly and made sure everything was working perfectly before leaving. I would definitely recommend him to anyone needing plumbing or installation work. Great job!Verified reviewerJob location: UB7Response from Black Mammoth Plumbing and Heating Ltd
Thank you for your kind review – I really appreciate you taking the time to share your experience!
10 Change of Thermostat Cartridge
Posted 24 April
Job location: SW20Slava reached out to me promptly for appointment, he came to check the issue and performed a proficiency assessment. Offer solution by replacing the cartridge and got part very quick to catch up my schedule.Response from Black Mammoth Plumbing and Heating Ltd
Thank you for your kind review – I really appreciate you taking the time to share your experience!
Photos
Company Info
Owner
Mr Viaceslav Mamontov
Ltd Company
3 years on Checkatrade
VAT Registered
No
We are a trusted, local plumbing company based in South West London, committed to delivering the highest quality service with a seamless and stress-free experience. Whether you need expert plumbing, boiler servicing, central heating repairs, or waste system installations, we bring a detail-oriented, customer-first approach to every job.
With over 10 years of hands-on experience in domestic and light commercial work, I am a fully qualified Gas Safe registered engineer, holding WRAS certification and a Level 3 Diploma in Plumbing and Domestic Heating (City & Guilds). My services cover everything from routine maintenance and landlord safety checks to emergency plumbing call-outs and fault diagnostics. I am fully insured and compliant with the latest building and gas safety regulations.
We pride ourselves on punctuality, transparency, and workmanship that stands the test of time—earning the trust of homeowners, landlords, and property managers across South West London.
Accreditations and awards
This trade passed up to 12 Checkatrade vetting checks
Member since 2022
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