Quality service and professional accreditations

plumbline-teamPlumb-Line guarantees a high quality and professional service and has the following registrations and accreditations:

Which? Trusted Trader
Plumb-Line is endorsed by the Which? Trusted Trader scheme after passing a rigorous assessment to ensure that we are a reputable company meeting its high demands.  The evaluation process covers all aspects of customer service, business processes, administration and financial stability. We agree to abide by the Which? Trusted Traders' Code of Conduct. Here are some of Plumb-Line's Which? Trusted Trader Reviews

Which Trusted Trader Logo_sm_LR.png

TrustMark is a government-endorsed quality scheme to enhance levels of consumer protection in a range of industries. Plumb-Line has been independently assessed to ensure that we meet the operating requirements, code of conduct and customer charter to deliver a high-quality service to customers. Only companies with the TrustMark accreditation are qualified to carry out work on specific Government-funded schemes.

PAS2030 sets out the requirements that all installers must follow to ensure that the installation of energy efficient measures is completed properly. It is the standard required for government schemes such as ECO, the Green Homes Grant and First-Time Central Heating. PAS2030 addresses all areas including installation controls, equipment inspections, handover and correction action procedures.

Plumb-Line is accredited by MCS, (Microgeneration Certification Scheme) an internationally recognised quality assurance scheme for small scale generation of renewable energy. This certification gives us a mark of competency and demonstrates that we can install to the highest quality every time. It demonstrates that we are committed to meeting rigorous and testing standards. The company has been assessed for the supply, design, installation, set-to-work and commissioning of renewable microgeneration technologies. To take advantage of government funding you must ensure that the product and the installer are both MCS certified.


Gas Safe
The Gas Safe Register is the only official list of gas engineers legally able to perform gas work on boilers, hobs, ovens, fires and all other gas appliances. All of our engineers are Gas Safe Registered and are happy to show you their ID card to prove it. Gas Safe Register replaced CORGI as the gas registration body in Great Britain in 2009.  A Gas Safe registered engineer has been checked to make sure they are competent and qualified to work safely and legally with gas.

NICEIC is the UK electrical contracting industry’s independent voluntary body. It has been assessing the technical competence of electricians for over 50 years and maintains a register of qualified, competent electricians. The NICEIC looks at a representative sample of the contractor’s work, their premises, documentation, equipment, and the competence of their key supervisory staff.  Once contractors become registered with NICEIC, they are re-assessed on a regular basis to ensure high standards.

Safe Contractor
Plumb-Line has been awarded accreditation from safecontractor for our commitment to achieving excellence in health and safety. The safecontractor accreditation recognises high standards in health and safety and demonstrates that we have sound health and safety policies in place.


Plumb-Line is registered by HETAS, the official approval body for solid fuel, wood and solid biomass products and services within the UK. The scheme aims to ensure that users of solid fuel, wood and solid biomass burning equipment have work undertaken by a competent engineer/technician working for a registered company, and can expect that the work will be carried out safely and to a good standard.


OFTEC is the technical and marketing body for the oil-fired heating industry, and every OFTEC Registered Technician must hold a current certificate of assessed competence issued by a UKAS Accredited Certification Body for OFTEC Assessments.

Renewable Energy Consumer Code
Plumb-Line is a member of the Renewable Energy Consumer Code. The aim of the scheme is to ensure that consumers who wish to install a small-scale heat or power generation unit for their home can be confident in making an informed choice from suppliers with the necessarily high service standards. As a member, we agree to comply with the Renewable Energy Consumer Code, which is backed by the Trading Standards Institute as part of its self-regulation initiative, the Consumer Codes Approval Scheme. The Code reflects Plumb-Line’s business ethics and dedication to customer service, providing clear information to customers and behaving in a safe and environmentally responsible way.

The Association of Plumbing and Heating Contractors (APHC) is the leading trade association for the plumbing and heating industry in England and Wales. It operates a licensed plumber scheme to ensure consumer protection. All members of the association are reliable, established businesses that employ fully trained staff and are commited to high levels of customer service. Each member undertakes an annual assessment to ensure they are meeting the strict business standards. Part of these standards is to hold and operate an approved customer complaints system.


Constructionline is the UK's largest register for pre-qualified contractors and consultants in the construction industry.