Гибкая подводка снова течёт.

In everyday Russian, гибкая подводка is a plumbing term. It usually means a flexible water supply hose/line — the kind of hose that connects a tap, toilet, washing machine, etc. to the water supply.

A few useful notes:

• гибкая = flexible
• подводка literally comes from the idea of bringing/supplying something to something
• In plumbing, подводка often means a supply line or connection hose

So in this sentence it is not just any lining or lead-in; it is specifically the plumbing item.

Because гибкая has to agree with подводка.

Подводка is:

• feminine
• singular
• nominative here

So the adjective must also be:

• feminine
• singular
• nominative

That gives:

• masculine: гибкий
• feminine: гибкая
• neuter: гибкое

Since the noun is подводка, the correct form is гибкая.

It is in the nominative case because it is the subject of the sentence.

The sentence structure is basically:

• Гибкая подводка = the subject
• снова = adverb, again
• течёт = verb, is leaking / leaks

So the thing doing the action is гибкая подводка, which is why it stays in the nominative.

Течёт comes from the infinitive течь.

This verb can mean:

• to flow
• to run
• to leak

In this sentence, because we are talking about plumbing, it means to leak.

Течёт is the:

• 3rd person
• singular
• present tense

form, because the subject is one thing: гибкая подводка.

So:

• я теку = I flow / I am leaking
• ты течёшь
• он / она / оно течёт
• они текут

Yes, literally the basic verb течь is connected with flowing.

But in Russian, just like in English, the same idea can extend to leaking. A liquid flows out of something that should not be letting it out.

So in context:

• Река течёт = The river flows.
• Кран течёт = The tap is leaking.
• Труба течёт = The pipe is leaking.
• Подводка течёт = The supply hose is leaking.

So the exact English translation depends on context, not just on the dictionary meaning of the verb.

Снова means again.

In Гибкая подводка снова течёт, it modifies the verb течёт, so the sense is is leaking again.

Its position is very natural and neutral here:

• Гибкая подводка снова течёт.

Russian word order is more flexible than English, so you could also hear things like:

• Снова течёт гибкая подводка.
• Гибкая подводка течёт снова.

But these may sound different in emphasis or style. The version in your sentence is a normal, straightforward way to say it.

Because in Russian, the verb to be is normally not expressed in the present tense.

In English you say:

• The flexible hose is leaking again.

In Russian, you just say:

• Гибкая подводка снова течёт.

Russian does not need a separate present-tense is here.

Compare:

• Он дома. = He is at home.
• Она врач. = She is a doctor.
• Подводка течёт. = The hose is leaking.

So this is completely normal Russian grammar.

No. Подводка can have different meanings depending on context.

For example, it can mean:

• a lead-in or intro to something
• eyeliner in cosmetics
• a connection/supply line in technical or plumbing contexts

That is why context matters a lot. In your sentence, because of гибкая and течёт, the plumbing meaning is clearly intended.

Течёт is pronounced roughly like tye-CHYOT.

Important points:

• the ё is stressed
• ё usually sounds like yo
• so течёт is different from what an English speaker might guess from the spelling without the dots

In many Russian texts, ё is often written as е, so you may also see:

• течет

But it is still pronounced течёт.

That means learners have to know the word already or infer it from context/dictionaries.

Yes, often you can.

• течёт = is leaking / leaks
• протекает = is leaking, often a bit more explicitly has a leak

For plumbing, both can work:

• Подводка течёт.
• Подводка протекает.

The first is very common and natural in everyday speech. The second can sound slightly more explicit or technical, depending on context.

The standard stress is:

• ги́бкая
• подво́дка
• сно́ва
• течёт

So:

Ги́бкая подво́дка сно́ва течёт.

A rough pronunciation guide:

GEEP-kaya pad-VOT-ka SNO-va tye-CHYOT

The exact sounds are not identical to English, but that gives a helpful approximation.