Hi Anthony, YES, there are affiliate programs for plumbing and heating. Faucet.com and HomeDepot both have affiliate programs that you can join and earn a commission. Now, obviously, if customers need very specific parts only, this may be an issue. But, I know marketers that make a nice income using sites like the ones I mentioned and others. I would front it with your own website and build a following. These are things discussed within the Wealthy Affiliate program, how to build a website and earn money in something you’re passionate about. Check out Wealthy Affiliate. It’s free to join… Read more »
Content Marketing: Writing articles or blog posts related to your business and submitting them to be published on other websites is another great way to reach your target market for free. Although mass distribution of a single article across the web doesn't have the same SEO benefits it once had, submitting exclusive articles to a specific site can still reap many rewards including SEO, boosting your credibility, and reaching a market that might not otherwise know about you. Because writing can be time-consuming, you may want to consider how you can repurpose what you write into other forms of content or with new angles for other audiences.
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ad will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.