Here is the reality of running a plumbing company. The phone rings at 10 PM on a Saturday because someone's water heater just flooded their basement. It goes to voicemail. Your tech checks the message on Monday morning. By then, the customer has already called three other companies and hired the one that picked up.
During business hours, it is not much better. Your plumber is under a sink at 2 PM when three calls come in. Your office manager is processing an invoice. The calls go to voicemail. Two of those three callers will not leave a message -- they will just call the next plumber in the search results. That is revenue you will never even know you lost.
Then there is the follow-up problem. You replaced a water heater for a customer two years ago. That customer's sewer line probably needs an inspection. Their water softener needs a filter change. Their outdoor spigots need winterization. But nobody in your company is tracking that. Nobody is reaching out. And when that customer does need a plumber again, they might not remember your name -- but they will remember the one who showed up in their inbox last week with a helpful reminder.
Plumbing is not a one-time transaction business. It is a relationship business. And relationships require follow-up. The companies that follow up systematically build recurring revenue streams that smooth out the feast-or-famine cycle. The ones that do not are forever dependent on the next phone call from a stranger.