Hollow Knight: How to Reach the Putrified Ducts
As with many other regions in Hollow Knight, entering the Purified region will require a series of tasks and challenges. You don't just walk up your way right there like it's a one-road destination. Hornet will need to be smart about her routes and what she must do to enter this region. As our interactive map shows, the purified ducts in Hollow Knight: Silksong form the northeastern edge of Pharloom. It is one of the hardest regions a player can access in the gameplay. While it includes two potential routes, the requirements for each are the same. You should know that meeting the requirements for entering this region is one thing, reaching the ducts is another. This guide will explain what you need to do before you enter the ducts and how you can navigate your way through.
How to Enter the Purified Ducts through Memoriam

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Here we are: Our first and most common way to reach the purified ducts in Hollow Knight: Silksong! This path requires that you jump through the narrow passage leading from the Choral Chambers into the Memorium region. While it looks easy, it is quite tricky. A player must have obtained the Faydown Cloak's double jump ability before getting to this passage. On getting there, you should follow the steps below to gain entry:
- Explore the Choral Chambers. You can do this by optionally unlocking the path to the Grand Bellway Station and Grand Bellway Ventrica Station, as well as the Ventrica Station at the First Shrine (Songclave). If you're able to do this, traveling to the Memorium passage would become much easier.
- At the bottom of the Choral Chambers lie the Whiteward and the Underworks. Descend into these regions and navigate to the heart of the Underworks. Then get the clawline ability.
- Once you secure the Clawline ability, gain access to The Slab through the passage northwest of the Citadel Spa. Look for the Bellway Station in the lower areas and head west into Mount Fay.
- Get to the top of Mount Fay, where you'll unlock the Faydown Cloak, thus receiving the ability to double jump. As soon as you jump through the vertical passage to the Memorium, break the ceiling to reach the lower chamber and take the second-lowest exit to the right. Don't stop until you reach another larger chamber and drop down. Then navigate into the room with the wooden sign. Once you get into the room, you might get a prompt to pay 70 rosaries to get the Memorium map. Your next stop would be the Hollow Knight purified ducts. To find this region, jump towards the grey curtains on the ceiling to find a secret passage.

Drop down from the balcony, cross the bridge, and use the double jump ability to destroy the breakable wall on the other side. Once you enter the room with spikes, double jump again to reach the passage above you. That's how to reach the purified ducts in Hollow Knight: Silksong. How to Reach the Purified Ducts in Hollow Knight: Silksong through Bilewater Alternatively, you can gain access to the purified ducts in Hollow Knight: Silksong from the Bilewater region in the South. However, be ready to encounter a multitude of enemies. Also, remember to obtain the Faydown Cloak ability.
To enter the purified ducts through the Bilewater region, follow the steps below:
- Above Greymoor is the Sinner's Road. Enter it.
- Walk east until you see the bench sign in the vertical chamber. It is broken, but you can fix it by breaking the wall above the bench and completing a brief parkour run.
- Exit the vertical chamber through the east. Break the wall to enter Bilewater.
- Navigate right until you find a large vertical chamber. Go left then double jump to enter the narrow passage.
- Parkour your way up then navigate through the upper route to the east until you can go no further. Take the route as it loops back to the upper left where you'll find the Groal the Great boss.
- Battle with him and exit the boss arena to the left then jump up to enter the purified ducts.

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FAQs
What Do I Need to Enter the Purified Ducts in Hollow Knight: Silksong?
First, you get the Faydown Cloak ability.
What Are the Paths that Lead to the Purified Ducts?
You can either go through the Memorium or the Bilewater region to get to the ducts.
Which Path Will A Player Likely Encounter Enemies While Traveling to the Purified Ducts?
The Bilewater region.
What is the Name of the Popular Boss Likely to Be Encountered in the Bridgewater Region?
Groal the Great Boss is who you will likely meet on your way to the Bilewater.
Conclusion
As you can see, the purified ducts in Hollow Knight: Silksong aren't something you just walk up through like you're heading home. It involves two routes, each with the same requirements. However, the Bilewater region may seem harder than the former. This is because you'll encounter lots of enemies on your way through. Either way, you must get your Faydown Cloak ability, explore some areas, and watch out for loopholes to avoid impeding your progress. Feel free to check out our Scalacube features if you want!