Hey there Kevin. Pipelines are most certainly having their time in the sun right now. Pembina, Enbridge, TC Energy etc all sitting on 20%+ gains to start the year. It's about time as well, pipelines were bottom of the barrel in terms of returns for a while now.
Personally I see more room for pipelines to the upside moving forward. Valuations aren't really that stretched. For example even though Enbridge has had a 20% run YTD, it's still trading at a double digit discount to its historical valuations. That being said, success with investing comes from having a strategy and sticking to it. If 4-5% allocation is the max for your portfolio, then stick to it. That doesn't necessarily mean trimming. Depending on the size of your portfolio it could easily mean additional contributions as well.