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 »
I 1st learned about affiliate marketing back in 2005 when I went on Walmart.com as a thought came to me to visit the site for no reason. Not long afterwards, I started a free blog on blogspot, not knowing what I was doing nor knowing anything about blogging. 2006 came and I flew to Santa Barbara, California to an event to see how real affiliate marketing was. Then I struggled as years went by with online marketing. I made money from eBaY, Walmart, and a few other affiliate programs. Been hooked ever since. I do create content now on a daily basis and love the side hustle millionaire mentality. I wish I knew how to do this back in 1999 when I was still working crappy jobs. I prolly would’ve been close to $20 million richer by now and loaded with $ gUaP $ ! :-)

Many affiliate programs run with last-click attribution, where the affiliate receiving the last click before the sale gets 100% credit for the conversion. This is changing. With affiliate platforms providing new attribution models and reporting features, you are able to see a full-funnel, cross-channel view of how individual marketing tactics are working together. For example, you might see that a paid social campaign generated the first click, Affiliate X got click 2, and Affiliate Y got the last click. With this full picture, you can structure your affiliate commissions so that Affiliate X gets a percentage of the credit for the sale, even though they didn’t get the last click. 

I know it’s part of Shareasale, but Wayfair might be worth mentioning. They’re a huge site (mainly home & garden and pets) and actually have a better selection than Amazon in a lot of categories. I used them successfully on an old home furnishings site I had since Amazon’s selection of products was lacking in this particular niche. 5% commission on everything with a 30-day cookie and easy to get approved from what I remember.
The concept of affiliate marketing on the Internet was conceived of, put into practice and patented by William J. Tobin, the founder of PC Flowers & Gifts. Launched on the Prodigy Network in 1989, PC Flowers & Gifts remained on the service until 1996. By 1993, PC Flowers & Gifts generated sales in excess of $6 million per year on the Prodigy service. In 1998, PC Flowers and Gifts developed the business model of paying a commission on sales to the Prodigy Network.[8][9]
×