When I started my business as a pipeline contractor, I spoke with a colleague who had retired from the pipe business. I asked him what was most important for my young business to come out well. He told me that there were only two things that were truly worried and it was the pricing and quality of the workforce. If I focus on the quality of work superior at a decent cost I don't need to worry about keeping the client.
High quality means bringing competent technicians, and good people are not cheap, so don't try to appreciate your service too low. You can search for Surrey plumbers and drain cleaning from various online sources.
In many cases, the pipe contractor will make a subsequent low bid proposal with the aim of finding some "invisible" expenditure later. Maybe "section costs more than expected", etc. Many pipe companies that you see are advertised offering low prices and doing work quickly. But this does not automatically mean you get high quality works.
Discounted installations are often not licensed or insured. Unfortunately, it may be that the injury to a plumber that is not insured on your property can cause you to be responsible for his medical bill. Additional ways that cheap plumber reduces costs is to use low-quality components and equipment.
If you are given an offer that seems too good to be true, make sure you get a guarantee on the quality of work and parts. On the other hand, don't talk about too much for pipework. You must have an idea about the cost of the main part or schedule.
You can get a good rough number just by checking pipe supplies on the home depot website or comparable home repair shop. Very reasonable for customers to let pliers know that he wants a certain water heater model and how much it costs.