Hi, if you mean making it as part of your map you can do 2 things:
1. Spawn a prop_physics using the entities tools and change the world model to something made of wood like a crate.
2. Make a brush face (a normal solid block, using the block tool) and press "Ctrl + T" or click tools, tie to entity and select func_breakable then choose the settings you want.
The only in game editors for portal are these 2 which I can think of: 1.garrys mod (not really much of a game EDITOR) 2.Valve's hammer editor, where you can create your own levels for more or less every game on steam (although im not sure and its very complicated)
Source SDK's Hammer editor is used to make all valve produced games such as CS:S, HL2, Team Fortress, L4D and more Go to www.devloper.valvesoftware.com
A hammer arrester valve in a plumbing system is used to prevent water hammer, which is a loud banging noise that occurs when water flow is suddenly stopped. The valve absorbs the shock caused by the sudden stoppage of water flow, protecting the pipes and fixtures in the plumbing system from damage.
When a valve is closed quickly the flow of water is interupted causing a water hammer. A water hammer arrestor or air chamber can be used to absorb the hammer.
Water hammer in a toilet is often caused by high water pressure or a malfunctioning fill valve. To solve this issue, you can try adjusting the water pressure, installing a water hammer arrestor, or replacing the fill valve.
Any quick closing valve such as a solenoid can cause hydraulic shock waves
Spray wd40 or equal and tap valve "gently" with a hammer while "gently" appling turn pressure on valve.
To release air that cause water hammer
sudden stopages of flow by the closure of a valve
Through the spark plug hole, soak the valve with penetrating oil. After sitting a while, tap lightly on the valve stem with a hammer. If after several tries this does not work then the head will need to be removed to see why the valve is stuck.
The shut off valve may be stuck due to debris or corrosion. To fix it, try lubricating the valve with a penetrating oil and gently tapping it with a hammer. If that doesn't work, you may need to replace the valve.
It's a pain. You need to pull the valve cover, remove the timing belt and the camshaft over the stuck valve, and tap the valve real lightly with a hammer to unstick it.